The Chemical Basis of Converting Light into a Photographic Silver

The chemical basis of converting light into a photographic silver image is based on the fact that

A) Ag⁺ exposed to light is easier to reduce to Ag than unexposed Ag⁺.
B) Ag⁺ exposed to light is more difficult to reduce to Ag than unexposed Ag⁺.
C) Ag⁺ exposed to light is easier to oxidize to Ag than unexposed Ag⁺.
D) Ag⁺ exposed to light is more difficult to oxidize to Ag than unexposed Ag⁺.