If a train is pulling a caboose, the caboose will move if the train exerts a force on the ground that is:
A) Equal to the force exerted by the caboose on the train.
B) Greater than the force exerted by the caboose on the train.
C) Lesser than the force exerted by the caboose on the train.
D) Irrelevant to the force exerted by the caboose on the train.