A company is using AWS to host all of its applications. Each application is isolated in its own Amazon VPC.
Different environments such as Development, Test, and Production are also isolated in their own VPCs.
The network engineer needs to automate VPC creation to enforce the company's network and security standards. Additionally, the CIDR range used in each VPC needs to be unique.
Which solution meets all of these requirements?

A. Use AWS CloudFormation to deploy the VPC infrastructure and a custom resource to request a CIDR range from an external IP address management (IPAM) service.
B. Use AWS OpsWorks to deploy the VPC infrastructure and a custom resource to request a CIDR range from an external IP address management (IPAM) service.
C. Use the VPC wizard in the AWS Management Console. Type in the CIDR blocks for the VPC and subnets.
D. Create the VPCs using AWS CLI and use the dry-run flag to validate if the current CIDR range is in use.