Storage Transfer Service provides options that make data transfers and synchronization easier. We can also schedule one-time transfer operations or recurring transfer operations.
Reference link- https://cloud.google.com/storage-transfer/docs/overview Reference link- https://cloud.google.com/architecture/transferring-data-from-amazon-s3-to-cloud-storage- using-vpc-service-controls-and-storage-transfer-service

In the Infrastructure as a Service (IaaS) model under the shared responsibility model, the cloud provider (e.g., Google Cloud) is responsible for the physical security of the infrastructure, including data centers, hardware, and the physical environment. The customer is responsible for managing the operating system, applications, and data.
Option B: Physical security is correct because it describes the cloud provider's responsibility in securing the physical aspects of the infrastructure.
References:
Google Cloud Shared Responsibility Model: Customer and Provider Responsibilities Google Cloud Security Overview: Physical Security Measures

Scalability. When your apps require additional compute resources, autoscaled MIGs can automatically grow the number of instances in the group to meet demand. If demand drops, autoscaled MIGs can automatically shrink to reduce your costs

https://cloud.google.com/compute/docs/instance-groups

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