A company's application is deployed with a user-managed Service Account key. You want to use Google-recommended practices to rotate the key. What should you do?

A company's application is deployed with a user-managed Service Account key. You want to use Google-recommended practices to rotate the key.
What should you do?

A. Open Cloud Shell and run gcloud iam service-accounts enable-auto-rotate --iam-account=IAM_ACCOUNT. B. Open Cloud Shell and run gcloud iam service-accounts keys rotate --iam-account=IAM_ACCOUNT --key=NEW_KEY. C. Create a new key, and use the new key in the application. Delete the old key from the Service Account. D. Create a new key, and use the new key in the application. Store the old key on the system as a backup key.