Which component of a marine refrigeration system separates the high side from the low side and controls the flow of liquid refrigerant into the evaporator?

Why D is correct

The metering device is the dividing point between the high side and the low side of the system. It throttles high-pressure liquid to low evaporator pressure and controls how much refrigerant enters the evaporator. The receiver stores liquid charge, the compressor raises pressure, and the filter-drier removes moisture and particles.