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You are developing an e-commerce website on Compute Engine that operates over HTTPS. The infrastructure must scale horizontally in response to traffic and automatically restart any unhealthy instances. Which approach is most suitable?
A
Add a startup script in the Instance Template that sends a heartbeat to the metadata server.
B
Create a multi-zone managed instance group instead of a single zone.
C
Add a metadata label ‘health-check’ to the VM.
D
Create a managed instance group with a health check on port 443.
