A company is launching an ecommerce application that must always be available. The application will run on Amazon EC2 instances continuously for the next12 mont...

A company is launching an ecommerce application that must always be available. The application will run on Amazon EC2 instances continuously for the next12 months.
What is the MOST cost-effective instance purchasing option that meets these requirements?

A. Spot Instances B. Savings Plans C. Dedicated Hosts D. On-Demand Instances