How can you secure data at rest on an EBS volume?

How can you secure data at rest on an EBS volume?
A . Attach the volume to an instance using EC2’s SSL interface.
B . Write the data randomly instead of sequentially.
C . Encrypt the volume using the 53 server-side encryption service.
D . Create an lAM policy that restricts read and write access to the volume.
E . Use an encrypted file system on top of the EBS volume.

Answer: E

Explanation:

Reference: https://aws.amazon.com/blogs/aws/protect-your-data-with-new-ebs-encryption/