Please Help.

8) Chlorophyll gives plants their green color. Chlorophyll is produced only when plants are exposed to light, so plants kept in darkness have no chlorophyll and appear white. The best explanation for this is that...

A) darkness mutates the chlorophyl genes, causing them to produce a white color

B) chlorophyll is not needed by green plants at night

C) light is required for chlorophyll genes to be expressed

D) genetic information in cells is not influenced by the outside environment​