difference between encode and decode?

A: Encoding is the sending of a message while decoding is the opening of the message

B: Encoding is the process by which a sender puts the message in a certain format. Decoding is the process by which the receiver interprets and transaltes the meaning of the sender$\text{'}$s message

C: Encoding adds personal context to a message. Decoding removes that personal context from the message

D: Encoding is the process of typing and sending an electronic communication. Decoding is the receiver of the message adding their own interpretation to the digital content.