Which One of the Following Best Describes the Evolutionary Advantage

Which one of the following best describes the evolutionary advantage of bipedalism?

A) allows an organism to have precise control over the action of the thumb and fingers
B) frees the hands for carrying objects
C) results in improved eye-hand coordination
D) in early humans, allowed for complex motions associated with the use of tools
E) increases the chance that an organism can communicate through the written word