A girl using a wheelchair needs to go up a ramp. She can choose a steeper ramp or a less steep ramp. Both ramps lead to the same place. Why is the less steep ramp more helpful than the steeper ramp?
A. The height to which the person must travel is decreased.
B. Less force is needed to move up the ramp.
C. The direction of force needed to do the work is changed.
D. Less work is needed to move up the ramp.