What Purpose Do the Various Cell Layers of the Retina

Multiple Choice

What purpose do the various cell layers of the retina (other than the rods and cones) serve in the visual process?

A) They increase the amount of light received.
B) They protect the rods and cones from receiving too much light.
C) They process visual signals to obtain more precise visual information.
D) They speed up transmission by immediately transducing light into electric signals.
E) They each produce a complete image,all of which come together at the optic nerve.