If your application performs operations or workflows that take a long time to complete, what service can the Elastic Beanstalk environment do for you?

Answer options:

A.Manages an Amazon SQS queue and running a daemon process on each instance. 
B.Manages an Amazon SNS Topic and running a daemon process on each instance.
C.Manages Lambda functions and running a daemon process on each instance. 
D.Manages the ELB and running a daemon process on each instance. 

Answer - A
Elastic Beanstalk simplifies this process by managing the Amazon SQS queue and running a daemon process on each instance that reads from the queue for you. When the daemon pulls an item from the queue, it sends an HTTP POST request locally to http://localhost/ with the contents of the queue message in the body. All that your application needs to do is perform the long-running task in response to the POST.
For more information on Elastic Beanstalk managing worker environments, please visit the below URL:
http://docs.aws.amazon.com/elasticbeanstalk/latest/dg/using-features-managing-env-tiers.html