An Application That Runs on Amazon EC2 Instances Behind an Application

Multiple Choice

An application that runs on Amazon EC2 instances behind an Application Load Balancer is deployed using AWS Elastic Beanstalk. During a recent rolling deployment, users experienced application errors even though application health checks were passing on all instances. A log analysis shows that the errors were caused by user requests being processed by two different versions of the application behind the same load balancer. The analysis also shows a recent change made the responses backward incompatible. Which deployment method will address these issues?

A) Update Elastic Beanstalk to deploy using the all at once method.
B) Update Elastic Beanstalk to deploy using the blue/green method.
C) Update Elastic Beanstalk to deploy using the immutable method.
D) Update Elastic Beanstalk to deploy using the rolling with additional batch method.