You Are Building a Ruby on Rails Application for Internal

Multiple Choice

You are building a Ruby on Rails application for internal, non-production use which uses MySQL as a database. You want developers without very much AWS experience to be able to deploy new code with a single command line push. You also want to set this up as simply as possible. Which tool is ideal for this setup?

A) AWS CloudFormation
B) AWS OpsWorks
C) AWS ELB + EC2 with CLI Push
D) AWS Elastic Beanstalk