What Does Owen Lovejoy's Provisioning Hypothesis Propose

What does Owen Lovejoy's provisioning hypothesis propose?

A) Bipedalism meant less body surface to expose to the sun,resulting in a smaller body size.
B) Monogamy and food provisioning created the necessity for bipedalism.
C) Bipedalism arose in areas where the forest was disappearing.
D) Bipedalism arose as a result of a shift to hunting as a primary source of food.