Which of the following is not true with respect to EBS volume encryption?

Answer options:

A.Encrypts data at rest inside the volume.
B.Encrypts all data moving between the volume and the instance.
C.Encrypts all snapshots created from the volume.
D.Encrypted EBS volumes are not supported on all current generation instance types.
 

Answer: D
Options A, B, C are true statements but the question asks for the false statement.
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/EBSEncryption.html 
Option D is a false statement, so it is correct.
Supported instance types:
Amazon EBS encryption is available on all current generation instance types and the following previous generation instance types: A1, C3, cr1.8xlarge, G2, I2, M3, and R3.
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/EBSEncryption.html#EBSEncryption_s%20upported_instances