IAM Secure and Scalable Is an Organization Which Provides Scalable

Multiple Choice

IAM Secure and Scalable is an organization which provides scalable and secure SAAS to its clients. They are planning to host a web server and App server on AWS VPC as separate tiers. The organization wants to implement the scalability by configuring Auto Scaling and load balancer with their app servers (middle tier) too. Which of the below mentioned options suits their requirements?

A) Since ELB is internet facing, it is recommended to setup HAProxy as the Load balancer within the VPC.
B) Create an Internet facing ELB with VPC and configure all the App servers with it.
C) The user should make ELB with EC2-CLASSIC and enable SSH with it for security.
D) Create an Internal Load balancer with VPC and register all the App servers with it.