Dana Sees No Glowing Embers When She Looks Directly at the Fireplace

Multiple Choice

Dana sees no glowing embers when she looks directly at the fireplace, but when she looks a little to the side, she can see a dimly glowing spot.The best explanation for this is that:

A) dark adaptation occurs faster outside the fovea
B) rods produce more retinal disparity
C) cones provide better acuity
D) rods are more sensitive to light than cones