Your team has configured an environment in Elastic beanstalk using the following configuration.
Java 7 with tomcat 7
They now want to change the configuration to Java 8 with Tomcat 8.5. How can they achieve this in the easiest way possible?
 

Answer options:

A.Change the configuration using the AWS console.
B.Create a new application revision.
C.Use the Change configuration environment.
D.Migrate the environment to Opswork.

Answer - A
This is mentioned in the AWS Documentation.
Please refer to page 523 on the below link
https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/awseb-dg.pdf
Options B, C and D are incorrect because they need extra or unnecessary work and are not as easy as option A.For more information on using Elastic beanstalk configuration changes, please visit the following URL-
https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/using-features.platform.upgrade.html