Exam AWS Certified Developer - Associate DVA-C02 topic 1 question 298 discussion

A is the correct answer.

Lambda destinations allow you to configure what happens to Lambda function invocation records when an invocation is successful or, in this case, when it fails. By setting a destination for failed invocations, you can specify another Lambda function to handle errors. This setup enables automatic error handling without requiring changes to the application code or the use of additional services for monitoring and triggering error-handling mechanisms. The error-handling Lambda function can then log details, send notifications, or take corrective actions as needed.

https://docs.aws.amazon.com/lambda/latest/dg/invocation-async.html#invocation-async-destinations

Should be A since Trigger is before execution

is not a valid approach because Lambda does not have a direct configuration for triggers based on failure conditions in the way described. The concept of a trigger is generally used for starting an invocation, not handling failures.