A developer has a stateful web server on-premises that is being migrated to AWS. The developer must have greater elasticity in the new design.
How should the developer re-factor the application to make it more elastic? (Choose two.)

A. Use pessimistic concurrency on Amazon DynamoDB.
B. Use Amazon CloudFront with an Auto Scaling group.
C. Use Amazon CloudFront with an AWS Web Application Firewall.
D. Store session state data in an Amazon DynamoDB table.
E. Use an ELB with an Auto Scaling group.