Your Team Wants to Begin Practicing Continuous Delivery Using CloudFormation

Multiple Choice

Your team wants to begin practicing continuous delivery using CloudFormation, to enable automated builds and deploys of whole, versioned stacks or stack layers. You have a 3-tier, mission-critical system. Which of the following is NOT a best practice for using CloudFormation in a continuous delivery environment?

A) Use the AWS CloudFormation <code>ValidateTemplate</code> call before publishing changes to AWS.
B) Model your stack in one template, so you can leverage CloudFormation's state management and dependency resolution to propagate all changes.
C) Use CloudFormation to create brand new infrastructure for all stateless resources on each push, and run integration tests on that set of infrastructure.
D) Parametrize the template and use <code>Mappings</code> to ensure your template works in multiple Regions.