Which of the following reasons helps explain why IM usage is overtaking email in some companies? 

a. People don’t have to be so formal when they use IM; it saves time to use acronyms and emoticons and to avoid using capitalization, punctuation, and other time wasters. 

b. IM works better as a broadcast mechanism than email. 

c. IM is faster than email and mimics human conversation better than email, so many people find it a more natural way to communicate.

d. IM systems let you communicate using different colors of text, which is vital for highlighting key points and conveying nonverbal aspects that are impossible to communicate in email.