Which of the Following Statements About the Molecular Events of Photoreception

Which of the following statements about the molecular events of photoreception is false?

A) A single photon can excite a rhodopsin molecule.
B) In a well-lit setting, most of the sodium channels of a rod cell are open.
C) cGMP keeps the sodium channels open.
D) Activated phosphodiesterase (PDE) catalyzes the reaction hydrolyzing cGMP into GMP.
E) Activated transducin activates PDE.