What Is a Characteristic of Rhodopsin

What is a characteristic of rhodopsin?

A) Rhodopsin's activity is different for rods and cones, but leads always to increasing amounts of neurotransmitters being released.
B) Rhodopsin is inactive in the dark and thereby inhibits the release of neurotransmitters from the synaptic terminal unless light is present.
C) Rhodopsin is active in the dark and thereby allows the release of neurotransmitters from the synaptic terminal in the absence of light.
D) Rhodopsin is inactive in the dark and thereby allows the release of neurotransmitters from the synaptic terminal unless light is present.