Your company has an application hosted on an Elastic beanstalk environment. You have been instructed that whenever application changes occur and new versions need to be deployed that the fastest deployment approach is employed. Which of the following deployment mechanisms will fulfil this requirement?

Answer options:

A.All at once
B.Rolling
C.Immutable
D.Rolling with batch

Answer - A
The following table from the AWS documentation shows the deployment time for each deployment methods.
For more information on Elastic beanstalk deployments, please refer to the below link:
http://docs.aws.amazon.com/elasticbeanstalk/latest/dg/using-features.deploy-existing-version.html