Answer: C- Encoding
Explanation: Encoding in communication is the process whereby the sender utilizes oral symbols like words, signs, pictures, videos, and non-oral symbols like body language, hand signals, facial expressions for which the sender believes the individual on the receiving side or audience will comprehend without misinterpreting.
It is the way of turning or transforming ideas into communication by using a channel that could be texts, phone calls or even in-person conferences. In this case, the marketing department decides to encode an ad campaign to the market so as to promote the new drug for lowering cholesterol.
