Algae Appear in Colors of Gold, Brown, Red, or Green

Algae appear in colors of gold, brown, red, or green. The significance of that fact is:

A) These pigments absorb the quality of light prevalent in their various preferred habitats and enhance their photosynthetic ability.
B) These pigments camouflage them from grazers.
C) These pigments warn grazers of their toxic properties.
D) These pigments are waste products stored in the tissues.
E) All of the other choices provided are incorrect.