The headend has several modulators assigning frequencies for distribution to the CATV network. What distribution device should you use immediately at the headend to distribute the modulator's output…

A splitter divides one input signal into multiple outputs, which is the opposite function needed at the headend where multiple signals must be merged into one.

A directional coupler is used mid-distribution to tap a portion of signal from a trunk line while passing the remainder forward, not to aggregate multiple modulator outputs.

A combiner is a passive device that accepts multiple RF input signals from separate modulators, each on its own assigned frequency, and combines them into one broadband output signal. This composite signal is then fed into the distribution network. Without a combiner, the signals from individual modulators cannot be simultaneously delivered over a single coaxial plant.

A multiport tap is a subscriber-facing device installed on the distribution plant to provide drop connections to outlets, not to consolidate headend equipment signals.