What Is Thought to Be the Reason That There Are

What is thought to be the reason that there are no small impact craters on Mars?

A) Like Venus, Mars' atmosphere is too thick and these meteorites do not survive to make impacts on the surface.
B) The surface of Mars is too young to have impact craters.
C) Due to the gravitational pull of Mars' moons, most small meteoroids are deflected and never make it to the surface.
D) The wind blows small dust particles, eroding the surface of Mars, erasing small impact craters faster than they can form.
E) None of the above. Mars has lots of small impact craters.