The Red Coloration Seen on the Martian Surface Originates from

The red coloration seen on the Martian surface originates from

A) past volcanic activity covering the surface of the planet with red lava.
B) when Mars' had flowing water, it also has red algae, which stained the surface rocks.
C) the atmosphere blocking out blue light, only allowing red light to reflect off the surface.
D) the iron minerals in the surface rocks combining with oxygen in the atmosphere causing the surface to rust.