You Want to Configure 10 Compute Engine Instances for Availability

You want to configure 10 Compute Engine instances for availability when maintenance occurs. Your requirements state that these instances should attempt to automatically restart if they crash. Also, the instances should be highly available including during system maintenance. What should you do?

A) Create an instance template for the instances. Set the 'Automatic Restart' to on. Set the 'On-host maintenance' to Migrate VM instance . Add the instance template to an intsance group. Create an instance template for the instances. Set the 'Automatic Restart' to on. Set the 'On-host maintenance' to Migrate VM instance . Add the instance template to an intsance group.
B) Create an instance template for the instances. Set 'Automatic Restart' to off. Set 'On-host maintenance' to Terminate VM instances . Add the instance template to an instance group. Create an instance template for the instances. Set 'Automatic Restart' to off. Set 'On-host maintenance' to Terminate VM instances . Add the instance template to an instance group.
C) Create an instance group for the instances. Set the 'Autohealing' health check to healthy (HTTP) . Create an instance group for the instances. Set the 'Autohealing' health check to healthy (HTTP) .
D) Create an instance group for the instance. Verify that the 'Advanced creation options' setting for 'do not retry machine creation' is set to off.