When a horse pulls a cart, what is the force that helps the horse move

1.	When a horse pulls a cart, what is the force that helps the horse move forward?
A.	The force exerted by the cart on the horse
B.	The force exerted by the ground on the horse
C.	The force exerted by the ground on the cart
D.	The force exerted by the horse on the cart
Answer» C. The force exerted by the ground on the cart

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When a horse pulls a cart, what is the force that helps the horse move forward?

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