You need to ensure your personal SSH key works on every instance in your project. You want to accomplish this as efficiently as possible.
What should you do?
A. Upload your public ssh key to the project Metadata.
B. Upload your public ssh key to each instance Metadata.
C. Create a custom Google Compute Engine image with your public ssh key embedded.
D. Use gcloud compute ssh to automatically copy your public ssh key to the instance.
A
A is correct