You Need to Create an Autoscaling Managed Instance Group for an HTTPS

You need to create an autoscaling managed instance group for an HTTPS web application. You want to make sure that unhealthy VMs are recreated. What should you do?

A) Create a health check on port 443 and use that when creating the Managed Instance Group.
B) Select Multi-Zone instead of Single-Zone when creating the Managed Instance Group.
C) In the Instance Template, add the label 'health-check'.
D) In the Instance Template, add a startup script that sends a heartbeat to the metadata server.