Answer:
The correct answer is letter "D": All answer choices are correct.
Explanation:
Slang should be avoided in business writing and any other formal writing. By using slang a writer shows a lack of professionalism. The message tends to be ambiguous with terms that could be appealing verbally but do not cover the same function written.
Business writing must be objective, straight-to-the-point, use unburied verbs, and avoid exuberance.