What is true of the way that encryption works with EBS? 
 snapshots are also automatically encrypted. Your encrypted volumes and any associated snapshots always remain  protected. For more information, see Amazon EBS Encryption.  http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/EBSEncryption.html 
A.
Snapshotting an encrypted volume makes an encrypted snapshot; restoring an encrypted snapshot creates an encrypted volume  
when specified / requested. 
B.
Snapshotting an encrypted volume makes an encrypted snapshot when specified / requested; restoring an encrypted snapshot  
creates an encrypted volume when specified / requested. 
C.
Snapshotting an encrypted volume makes an encrypted snapshot; restoring an encrypted snapshot always creates an encrypted  
volume. 
D.
Snapshotting an encrypted volume makes an encrypted snapshot when specified / requested; restoring an encrypted snapshot always  
creates an encrypted volume.   
Explanation:
Explanation/Reference:
Snapshots that are taken from encrypted volumes are automatically encrypted. Volumes that are created from encrypted