A Colleague Is Attempting to Launch Several New CloudFormation Stacks

Multiple Choice

A colleague is attempting to launch several new CloudFormation stacks, and receives the following error response: What should be done to address the error?

A) Add a Pause to the CloudFormation templates.
B) Add an exponential backoff between CreateStack API calls.
C) Run the CloudFormation API calls from a larger Amazon EC2 instance.
D) Combine stack templates into one, and retry the CreateStack API call.