According to Amazon Alexa Best Practices, How Should an Alexa

According to Amazon Alexa best practices, how should an Alexa Skill Builder prevent unintentional requests against a skill's backend when using AWS Lambda?

A) Ensure that the session ID provided by the request to Lambda is not already in use.
B) Rotate the Lambda ARN regularly to prevent others from using the service.
C) Retrieve the Application ID property from the request JSON and validate it against the Lambda environment variables.
D) Provide the Lambda trigger with the Application ID so that it validates on the ask trigger.