A company is building a compute-intensive application that will run on a fleet of Amazon EC2 instances. The application uses attached Amazon EBS disks for storing data. The application will process sensitive information and all the data must be encrypted.
What should a Developer do to ensure the data is encrypted on disk without impacting performance?

A. Configure the Amazon EC2 instance fleet to use encrypted EBS volumes for storing data.
B. Add logic to write all data to an encrypted Amazon S3 bucket.
C. Add a custom encryption algorithm to the application that will encrypt and decrypt all data.
D. Create a new Amazon Machine Image (AMI) with an encrypted root volume and store the data to ephemeral disks.