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In AWS CloudFormation, a developer encounters parameter value resets during stack updates, which undo application-modified settings. What is the least effort solution to maintain parameter integrity across updates?
A
Apply a 'Retain' deletion policy to Parameter Store parameters within the CloudFormation stack.
B
Integrate an Amazon DynamoDB table for configuration, transferring parameters from Parameter Store.
C
Utilize an Amazon RDS instance for configuration management, migrating parameters to a database table.
D
Enforce a stack policy to restrict updates on Parameter Store parameters.
