When someone is determining how to express an idea,which stage of the communication model are they engaging in?

A) Having an idea
B) Transmitting the message through a channel
C) Determining how the audience will respond to the message
D) Encoding the idea as a message
E) Producing the message in a transmittable medium

When someone is determining how to express an idea, they are encoding the idea as a message. This is the process of taking the idea and putting it into a form that can be communicated to the intended audience. The other options refer to different stages of the communication model, but do not accurately describe the stage of determining how to express an idea.