Select the correct set of steps for exposing the snapshot only to specific AWS accounts.

A.
Select public for all the accounts and check mark those accounts with whom you want to expose the
snapshots and click Save.

B.
Select Private, enter the IDs of those AWS accounts, and click Save.

C.
Select Public, enter the IDs of those AWS accounts, and click Save.

D.
Select Public, mark the IDs of those AWS accounts as private, and click Save.

Explanation:
“To expose the snapshot to only specific AWS accounts, choose Private, enter the ID of the AWS account
(without hyphens) in the AWS Account Number field, and choose Add Permission. Repeat until you’ve added all
the required AWS accounts.”
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-modifying-snapshot-permissions.html