A. Incorrect.
Project-level access does not create a 5-year archival retention strategy.

B. Incorrect.
BigQuery is excellent for analytics, but Cloud Storage is the better long-term archival target and can still feed analytics later.

C. Incorrect.
Default monitoring retention does not meet a 5-year legal retention requirement.

D. Correct.
Cloud Storage is durable, cost-effective for long-term retention, and suitable for keeping exported operational data for legal or historical review.

A. Correct.
Dedicated Interconnect provides private RFC 1918 connectivity and high bandwidth, which fits frequent large database replication.

B. Incorrect.
Cloud VPN can provide private connectivity, but it is generally less appropriate for sustained high-volume 4 TB replication with frequent large updates.

C. Incorrect.
NAT and TLS translation adds unnecessary complexity and does not provide the direct private cloud connectivity needed.

D. Incorrect.
A self-managed VPN VM increases operational risk and is not the best managed connectivity pattern.

A. Incorrect.
Dataflow is a managed Apache Beam service, but migrating Hadoop and Spark jobs to it usually requires more code and pipeline changes.

B. Correct.
Dataproc is a managed Hadoop and Spark service that minimizes operational work and supports familiar ecosystem jobs.

C. Incorrect.
Running raw VMs gives flexibility but requires the team to manage the Hadoop or Spark cluster.

D. Incorrect.
GKE can run distributed workloads, but it does not provide the same low-change managed Hadoop/Spark experience as Dataproc.

A. Incorrect.
Unmanaged groups do not provide the same autoscaling and template-driven lifecycle management.

B. Correct.
Managed instance groups preserve a VM-based execution model while adding autoscaling and easier fleet management.

C. Incorrect.
Hadoop jobs are not a natural fit for an existing C++ VM test suite.

D. Incorrect.
App Engine is a platform for web applications and would require more application changes.

A. Incorrect.
Containers on standalone VMs still leave significant VM operations work.

B. Correct.
GKE provides managed Kubernetes orchestration and autoscaling for containerized workloads.

C. Correct.
App Engine Standard is a highly managed autoscaling platform that minimizes infrastructure operations.

D. Incorrect.
Custom machine types tune VM shape but do not create a no-ops architecture.

E. Incorrect.
Managed instance groups help with autoscaling VMs, but they are less no-ops than GKE or App Engine Standard.

A. Correct.
Kubernetes gives open-source portability and autoscaling, Jenkins supports CI/CD, and Helm provides templated application releases.

B. Incorrect.
This omits the continuous delivery and templated package-management pieces.

C. Incorrect.
Deployment Manager is useful, but raw Compute Engine is less aligned with open-source portable application stacks and service routing.

D. Incorrect.
This lacks Kubernetes-native portability, service segregation, and templated bundle deployment.

A. Correct.
App Engine can scale automatically for web traffic with minimal infrastructure management.

B. Correct.
Datastore-style storage is a managed NoSQL fit for simple web application user records.

C. Incorrect.
GKE and persistent disks add operational work and are not the lowest-management option.

D. Incorrect.
Bigtable is optimized for very high-throughput wide-column workloads, not simple campaign preference records.

E. Incorrect.
A single VM is a scalability and availability bottleneck.

A. Incorrect.
Dual writing improves redundancy but does not prove that individual log entries were not altered.

B. Incorrect.
Access control helps, but privileged users or compromised accounts could still tamper with logs.

C. Correct.
Digital signatures provide cryptographic evidence of log integrity and authenticity.

D. Incorrect.
Cloud Storage is durable, but a plain JSON object alone does not prove authenticity.

A. Incorrect.
Local init scripts alone are not the recommended Compute Engine metadata-driven shutdown mechanism.

B. Incorrect.
Uptime checks are unrelated to the preemption shutdown path.

C. Correct.
Compute Engine can run metadata startup and shutdown scripts on a best-effort basis during termination or restart.

D. Incorrect.
A self-managed xinetd URL is unnecessary and not the standard metadata configuration.

A. Correct.
BigQuery is the managed analytics warehouse for large-scale SQL analysis.

B. Incorrect.
Cloud SQL is not the right target for 100 TB log analytics and archival data.

C. Incorrect.
Cloud Monitoring and Logging are optimized for operations, not long-term disaster recovery backup plus ad hoc analytics at this scale.

D. Incorrect.
Bigtable is strong for low-latency and time-series workloads, but BigQuery is the better analytics-query fit here.

E. Correct.
Cloud Storage provides durable, cost-effective long-term storage for backup and archival retention.