Why Is Olduvai Gorge a Good Place to Look for Fossil

Multiple Choice

Why is Olduvai Gorge a good place to look for fossil hominins?

A) There were more hominins living in that region than in other parts of Africa.
B) There has been little human activity in the area, which preserved the fossils.
C) It has a good depositional environment that preserved fossils.
D) It has always been an arid environment.