How do you define Technical Steganography?

A.
Steganography that uses physical or chemical means to hide the existence of a message

B.
Steganography that utilizes written natural language to hide the message in the carrier in some
non-obvious ways

C.
Steganography that utilizes written JAVA language to hide the message in the carrier in some
non-obvious ways

D.
Steganography that utilizes visual symbols or signs to hide secret messages