There are 100 steps to get from the ground-floor of a building to its rooftop. Person A walks up to the roof in 100 steps, while person B climbs up, skipping every other step. It takes person A two minutes to reach the top, while person B does it in half the time. From the information provided one can deduce that: __________
a. Both A and B perform the same amount of work, but A delivers more power output than B.
b. Both A and B perform the same amount of work, but delivers more power output than A.
c. A perform more work because he has to walk twice as many steps.
d. B performed less work because it takes him a shorter time to make the climb.
e. B performed less work becuase he only has to work half time