You need to create a copy of a custom Compute Engine virtual machine (VM) to facilitate an expected increase in application traffic due to a business acquisition. What should you do? 

Answer options:

A. Create a Compute Engine snapshot of your base VM. Create your images from that snapshot.
B. Create a Compute Engine snapshot of your base VM. Create your instances from that snapshot.
C. Create a custom Compute Engine image from a snapshot. Create your images from that image.
D. Create a custom Compute Engine image from a snapshot. Create your instances from that image.

D

A custom image belongs only to your project. To create an instance with a custom image, you must first have a custom image. Reference: https://cloud.google.com/compute/docs/instances/create-start-instance