Which of the Following Statements Is True of Instant Messaging

Which of the following statements is true of instant messaging (IM) ?

A) With IM, your conversation with someone is free from eavesdropping.
B) With IM, it is important to pay careful attention to spelling and grammar when trading messages.
C) The best known IM programs require special hardware and training.
D) To use IM, you maintain a list of people with whom you want to interact.