The Distinctive Red Color of Mars Is Probably Caused by

The distinctive red color of Mars is probably caused by

A) progressive reddening of sunlight as it traverses the interplanetary dust between the Sun and Mars and then Mars and Earth.
B) red dust that is suspended high above the surface by winds and filters the sunlight.
C) the scattering of blue sunlight out of the optical beam by dust in the atmosphere, similar to sunsets on Earth.
D) iron oxides or rust in the soil.