A. Add a configuration file in TOML format to group configuration entries to every environment. Add a table for each testing and staging environment. Deploy updates to the environments by using the sam deploy command and the –config-env flag that corresponds to each environment.
B. Create additional AWS SAM templates for each testing and staging environment. Write a custom shell script that uses the sam deploy command and the –template-file flag to deploy updates to the environments.
C. Create one AWS SAM configuration file that has default parameters. Perform updates to the testing and staging environments by using the –parameter-overrides flag in the AWS SAM CLI and the parameters that the updates will override.
D. Use the existing AWS SAM template. Add additional parameters to configure specific attributes for the serverless function and database table resources that are in each environment. Deploy updates to the testing and staging environments by using the sam deploy command.