Messages protected by steganography can be transmitted to

A.
Picture files

B.
Music files

C.
Video files

D.
All of the above

Explanation:
D: Steganography is the hiding of a message inside of another medium, such as a photograph, music, or other item. Th e message itself is not encrypted, but its existence is hidden so that only the intended recipient would know how to reveal the message. Page 334.