Which of the Following Is True About Instant Messaging (IM)in

Which of the following is true about instant messaging (IM) in official corporate communication?

A) More than three-fourths of U.S.companies use IM for official communication.
B) IM has limited application and cannot substitute for an email or voice mail.
C) Some corporate leaders are concerned that the use of IM jeopardizes productivity and security.
D) While U.S.companies have accepted IM as an appropriate method of communicating policies and procedures, other countries have not yet seen the value of the technology.