Which of the following statements about the scope of a message is TRUE?

A) The amount of information in a message should be reduced for a skeptical or hostile audience.
B) A knowledgeable audience will necessitate a longer message with more supporting points.
C) Limit the scope of a message in order to convey the main idea as briefly as possible.
D) A greater number of supporting points will ensure that audience interest remains high.

Limiting the scope of a message is important for effectively conveying the main idea as briefly as possible. This helps avoid overwhelming the audience with too much information and keeps the message focused. Option A is incorrect because reducing the amount of information may not help a skeptical or hostile audience understand the message better; it may require a different approach altogether. Option B is incorrect because a knowledgeable audience may require less explanation and may not need as many supporting points. Option D is incorrect because while supporting points are important, too many can also lead to information overload and audience disinterest.