What Is the Most Important Reason You Should Determine What

What is the most important reason you should determine what your audience knows about the topic of your message?

A) You can decide on personal touches that show readers they are important.
B) You can anticipate whether the reader's reaction will be positive or negative.
C) You can gain the cooperation of your colleagues in presenting persuasive arguments.
D) You can move through the steps of the writing process more quickly.
E) You can decide how much jargon to use and what readability level is appropriate.