A development team is utilizing a CI/CD service provided by AWS to streamline their application deployment. They have automated their release process but require a senior developer's sign-off before the application is pushed to the live environment. Which step should be taken to guarantee that the senior developer is notified to review and approve the release after the automated tests pass?
Configure a monitoring service to send an alert to the senior developer when the automated testing phase succeeds.
Arrange for a service hook to issue an email notice to the senior developer upon the conclusion of the verification procedures.
Implement an approval action linked to a notification mechanism using an Amazon SNS topic which the senior developer is subscribed to for email alerts.
Develop a function within a serverless compute service to dispatch emails after validation checks have been passed.