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A.Contains four pair of wires of various gauge
B.Contains two wires in a red fireproof jacket
C.Contains four twisted pairs of wires
D.Contains eight wires within a thick jacket with a rip cord

A.multi-room audio， telephone， intercom and temperature control.
B.thermostat， CCTV， smoke detectors and keypads.
C.home theater， lighting control and multi-room audio.
D.video， digital cable， and satellite applications.