If You Drop a Rock and a Feather, the Rock

Multiple Choice

If you drop a rock and a feather, the rock hits the ground first.This demonstrates that:

A) The acceleration of gravity is not constant.
B) Heavier objects are accelerated faster by gravity than lighter objects are.
C) Air resistance has a larger effect on feathers than on rocks.
D) Rocks can't fly.
E) Gravity has little effect on a feather.