Why Is Mars Red

Multiple Choice

Why is Mars red?

A) Dust storms on the planet have blasted the planet so fiercely that the rocks have reddened.
B) The iron in the surface rocks have been oxidized over time.
C) Mercuric oxide is abundant and has a red tint.
D) Sulfuric acid rain etched a reddish color into iron-rich surface rocks.
E) The ancient volcanoes poured out vast plains of molten sulfur, much as on Io, which has now solidified and preserved the reddish color.