Objects $A$ and $B$ collide together. They end up joined together and stationary. During the collision, a force $+ F$ is exerted on object $A$ by object $B$. According to Newton’s third law, there will also be a force of

A.     $- F$ acting on object $B$.

B.     $- F$ acting on object $A$.

C.     $+ F$ acting on object $B$.

D.     $+ F$ acting on object $A$.

A