Your Company Maintains a Hybrid Deployment with GCP, Where Analytics

Your company maintains a hybrid deployment with GCP, where analytics are performed on your anonymized customer data. The data are imported to Cloud Storage from your data center through parallel uploads to a data transfer server running on GCP. Management informs you that the daily transfers take too long and have asked you to fix the problem. You want to maximize transfer speeds. Which action should you take?

A) Increase the CPU size on your server.
B) Increase the size of the Google Persistent Disk on your server.
C) Increase your network bandwidth from your datacenter to GCP.
D) Increase your network bandwidth from Compute Engine to Cloud Storage.