Which set of components must be defined in this scenario?

You are deploying resources within Microsoft Azure integrated with Contrail.

Which set of components must be defined in this scenario?
A . region, VPC, security groups, EC2 instance details
B . region, VNET, security groups, EC2 instance details
C . region, resource group, VPC, security groups, instance details
D . region, resource group, VNET, security groups, instance details

Answer: A