Holding Out Your Hands Sideways Helps You Keep Your Balance

Holding out your hands sideways helps you keep your balance along a narrow set of stepping-stones because

A) the arms outward balance your weight.
B) arms inward only add to your weight.
C) with arms outward, you've increased your total rotational inertia relative to the pivot point: your feet.
D) moving the arms outward puts a counter-torque on the stepping-stones.
Fill in the Blank Questions