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? 

Answer options:

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.

A