Why Are There No Smaller Craters on the Surface of Venus

Why are there no smaller craters on the surface of Venus, only bigger ones?

A) Because Venus is so close to the Sun, the Sun's gravity pulls all smaller chunks of material into the Sun before they can reach Venus
B) The seas and lakes of Venus erode away all the smaller craters when they flood
C) In Venus' thick atmosphere all smaller chunks of material burn up before they can reach the surface
D) Venus is so hot that smaller craters generally melt in the heat, becoming smooth surface
E) This is an unsolved mystery in astronomy; no one knows