Which of the following spreads out each of the individual wires of a UTP cable onto their own metal connector?

A BNC connector is a bayonet-style coaxial cable connector used with RG-58 cable, not for terminating individual UTP wire pairs.

A 110 block is a type of punch-down block used in structured cabling where each conductor of a UTP cable is pressed into an individual insulation-displacement connector, making separate electrical contact per wire. This is the standard method for cross-connecting horizontal cable runs in telecom rooms.

Plenum is a fire-resistance rating for cable jackets used in air-handling spaces - it describes the cable's physical properties, not a connector type.

An LC connector is a small form-factor fiber optic connector used with single-mode or multimode fiber, not with copper UTP cable.