Solution:
The right answer is A.
Sender-Message-Receiver
Communication is the process of conveying information between two or more people.
Sender sends a message. Message is the information which is to be conveyed and these would be include speaking, writing, video transmission, audio transmission, electronic transmission through emails, text messages and faxes and even nonverbal communication, such as body language. And these massages are received by the third party. This party is called the receiver.
This is the required right answer.