Answer to Question 1
Answer: B
Explanation: B) If you make grammatical or usage errors, you'll lose credibility with your audience, even if your message is correct in other respects.
Answer to Question 2
Answer: (1) Understand the difference between texting and writing; (2) Avoid obsolete and pompous language such as in due course or we are in receipt of; (3) avoid preaching and bragging; (4) be careful with intimacydon't be overly friendly or chatty; and (5) be careful with humor.