Correct Answer: B
Option A is incorrect. As this scenario talks about moving 100s of TBs, it is good to use Cloud Storage Transfer Service. Transfer Appliance is a good choice when we are moving 100s of Terabytes to Petabytes of data.
Option B is correct. As this scenario talks about moving 100s of TBs, it is good to use Cloud Storage Transfer Service.
Option C is incorrect. Fully managed NFS file servers on Google Cloud, filestore, are ideal for applications running on Google Kubernetes Engine clusters.
Option D is incorrect. Because ideally, you should use Cloud Storage Transfer Service.
https://cloud.google.com/transfer-appliance/docs/4.0
https://cloud.google.com/storage-transfer/docs/overview
https://cloud.google.com/filestore/docs