Need answer worth 10 !

how much force does each object in a gravitational field exert?

a. the object with more mass exerts more force on the smaller mass

b. only the object with more mass exerts the force

c. the objects exerts the same amount of force

d. the smaller mass exerts the force

the reaction mixture contains some ammonia, plus a lot of unreacted nitrogen and hydrogen. the mixture is cooled and compressed, causing the ammonia gas to condense into a liquid. the liquefied ammonia is separated and removed. the unreacted nitrogen and hydrogen are then recycled back into the reactor .