A horse pulls a wagon that weighs 10 times more than the horse. The horse pulls with a force of 500N to move the wagon forward. How much force does the wagon exert on the horse? *

a. More than 500N
b. It depends on the size of the horse
c. Less than 500N
d. 0N because a wagon cannot exert a force
e. 0N because the wagon is moving
f. 500N