Why Are There Fewer Large Impact Craters on the Earth's

Why are there fewer large impact craters on the Earth's seafloor than on the continents?

A) Seafloor crust is younger than continental crust,so it has had less time in which to suffer impacts.
B) The oceans slow large impactors and prevent them from making craters.
C) Erosion erases impact craters must faster on the ocean bottom than on land.
D) Most impacts occur on the land.