There is an application that consists of frontend and backend EC2 Instances behind classic ELBs. The database is deployed in AWS RDS. The application might not be able to scale properly. 
What should be used to scale the application appropriately? (SELECT TWO.)

Answer options:

A.Use Auto Scaling for the frontend EC2 instances.
B.Use Auto Scaling for the backend EC2 instances.
C.Replace the Classic ELB with Application ELB.D.Use Network ELB for both the frontend and backend instances.

Correct Answer – A and B
When you see a requirement for scaling, consider the Auto Scaling service provided by AWS. This can be used to scale both the frontend and backend instances.
For more information on Auto Scaling, please visit the following URL:
https://docs.aws.amazon.com/autoscaling/plans/userguide/what-is-aws-auto-scaling.html