Answer C- by illustrating how divided the people already are concerning language. C because it explains why it will be divided
Answer:
E: all of the above
Explanation:
All the points presented have some advice on how to create a more formal and professional tone in writing communication:
A and B: Mentioning the request in advance , and better explaining the purpose shows respect and consideration.
C and D: informal language and contractions are not fit for fomal and professional writing.