Refer to the Graph Below, Showing the Response of Rod

Refer to the graph below, showing the response of rod cells to flashes of light. Which of the following statements about the experiment depicted in the graph is true?

A) It demonstrates that the membrane potential of rod cells is hyperpolarized in the dark.
B) It demonstrates that the membrane potential of rod cells is depolarized by light.
C) The stimulus that produces tracing 1 causes the rod cell to release more neurotransmitter than the stimulus that produces tracing 3.
D) The membrane potential depicted in tracing 3 shows the response to dim light.
E) None of the above