An interactive, dynamic website runs on Amazon EC2 instances in a

single subnet behind an ELB Classic Load Balancer.

Which design changes will make the site more highly available?

A. Move some Amazon EC2 instances to a subnet in a different way.

B. Move the website to Amazon S3.

C. Change the ELB to an Application Load

Balancer.

D. Move some Amazon EC2 instances to a subnet in the same Availability Zone.