A. Perform drift detection on the CloudFormation stacks to track the changes.
B. Enable AWS Config to track the changes to the CloudFormation stacks.
C. Create change sets before updating the CloudFormation stacks. Most Voted
D. Create a CloudFormation root stack that has two nested stacks: one stack for the application layer and one stack for the network layer.
E. Create a CloudFormation cross-stack reference. Export company level VPC stack outputs. Import the stack outputs into the application stack. Most Voted

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