Jonathan Is Starting His First Full-Time Job After Graduating from College

Jonathan is starting his first full-time job after graduating from college, and he wants to sound conversational but professional on the job.What is the best advice you can give him?

A) Avoid using instant messaging on the job because doing so will make him look unprofessional.
B) Strive for an informal, conversational tone in most business messages.
C) Use IM abbreviations and slang in his professional messages to be concise and to show that he's up-to-date with technology.
D) Use high-level diction in most business messages.