Why Does the Moon Have a Layer of "Powdery Soil

Why does the Moon have a layer of "powdery soil" on its surface?

A) It is the result of countless tiny impacts by small particles striking the Moon.
B) It exists because the Moon accreted from powdery material after a giant impact blasted the Earth.
C) It is made by the same processes that make powdery sand on Earth.
D) Recent, large impacts shattered lunar rock to make this soil.