A Company Has an Application That Runs a Web Service

A company has an application that runs a web service on Amazon EC2 instances and stores . j p g images in Amazon S3. The web traffic has a predictable baseline, but often demand spikes unpredictably for short periods of time. The application is loosely coupled and stateless. The . j p g images stored in Amazon S3 are accessed frequently for the first 15 to 20 days, they are seldom accessed thereafter but always need to be immediately available. The CIO has asked to find ways to reduce costs. Which of the following options will reduce costs? (Choose two.)

A) Purchase Reserved instances for baseline capacity requirements and use On-Demand instances for the demand spikes.
B) Configure a lifecycle policy to move the . j p g images on Amazon S3 to S3 IA after 30 days.
C) Use On-Demand instances for baseline capacity requirements and use Spot Fleet instances for the demand spikes.
D) Configure a lifecycle policy to move the . j p g images on Amazon S3 to Amazon Glacier after 30 days.
E) Create a script that checks the load on all web servers and terminates unnecessary On-Demand instances.