A Company's New Mobile App Uses Amazon API Gateway

Multiple Choice

A company's new mobile app uses Amazon API Gateway. As the development team completes a new release of its APIs, a developer must safely and transparently roll out the API change. What is the SIMPLEST solution for the developer to use for rolling out the new API version to a limited number of users through API Gateway?

A) Create a new API in API Gateway. Direct a portion of the traffic to the new API using an Amazon Route 53 weighted routing policy.
B) Validate the new API version and promote it to production during the window of lowest expected utilization.
C) Implement an Amazon CloudWatch alarm to trigger a rollback if the observed HTTP 500 status code rate exceeds a predetermined threshold.
D) Use the canary release deployment option in API Gateway. Direct a percentage of the API traffic using the canarySettings setting.