How should you configure the instance group?

You are deploying an application to a Compute Engine VM in a managed instance group. The application must be running at all times, but only a single instance of the VM should run per GCP project.

How should you configure the instance group?
A . Set autoscaling to On, set the minimum number of instances to 1, and then set the maximum number of instances to 1.
B . Set autoscaling to Off, set the minimum number of instances to 1, and then set the maximum number of instances to 1.
C . Set autoscaling to On, set the minimum number of instances to 1, and then set the maximum number of instances to 2.
D . Set autoscaling to Off, set the minimum number of instances to 1, and then set the maximum number of instances to 2.

Answer: A