You plan to deploy three Azure virtual machines named VM1, VM2, and VM3. The virtual machines will host a web app named App1. You need to ensure that at least two virtual machines are available if a single Azure datacenter becomes unavailable. What should you deploy? 

Answer options:

A. all three virtual machines in a single Availability Zone
B. all virtual machines in a single Availability Set
C. each virtual machine in a separate Availability Zone
D. each virtual machine in a separate Availability Set

C

Use availability zones to protect from datacenter level failures. Reference: https://docs.microsoft.com/en-us/azure/virtual-machines/windows/manage-availability https://docs.microsoft.com/en-us/azure/virtual-machines/windows/tutorial-availability-sets