Which of the Following Is True About the Data Link

Multiple Choice

Which of the following is true about the data link protocol, SDLC:

A) It is a client-server protocol developed by Compaq in 1996.
B) It transmits each character independently of one another and includes start and stop bits for each character sent.
C) It uses a special bit pattern called a flag at the beginning and end of every frame or packet) .
D) It uses a contention media access control protocol and is used in most LANs today.
E) It does not have any error detection capabilities.