Refer to the exhibit.
RouterA#show interface pos8/0/0 POS8/0/0 is up, line protocol is up Hardware is Packet over Sonet Keepalive set (10 sec) Scramble disabled LMI enq sent 2474988, LMI stat recvd 2474969, LMI upd recvd 0, DTE LMI up Broadcast queue 0/256, broadcasts sent/dropped 25760668/0, interface broadcasts 25348176 Last input 00:00:00, output 00:00:00, output hang never Last clearing of "show interface" counters 31w5d 5 minute input rate 0 bits/sec, 0 packets/sec 5 minute output rate 39000 bits/sec, 60 packets/sec 63153396 packets input, 4389121455 bytes, 0 no buffer Received 0 broadcasts (0 IP multicast) 0 runts, 0 giants, 0 throttles 0 parity 44773 input errors, 39138 CRC, 0 frame, 0 overrun, 0 ignored, 27 abort 945596253 packets output, 62753244360 bytes, 0 underruns 0 output errors, 0 applique, 0 interface resets 0 output buffer failures, 0 output buffers swapped out 0 carrier transitions
Which WAN protocol is being used?

A.	ATM
B.	HDLC
C.	Frame Relay
D.	PPP