Opsins Are Membrane Bound G-Protein Coupled Receptors

Opsins are membrane bound G-protein coupled receptors.Which of the following would you expect to happen when light strikes a rod or cone in the human eye?

A) Opsin moves into the nucleus, turning on gene expression
B) Ion channels open generating an action potential
C) The light moves through the rod or cone into a neuron generating an action potential
D) Light causes a hormone to bind to the receptor
E) The light is passed on to a melanopsin molecule in the membrane