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The correct answer is B.

OBJ-2.1: Bayonet Neill-Concelman Connector (BNC connector) is a type of coaxial RF (Radiofrequency) electrical connector used in place of coaxial connectors. A DS3 (Digital Signal 3) is also known as a T3 line with a maximum bandwidth of 44.736 Mbit/s. DS3 uses 75 ohm coaxial cable and BNC connectors.

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