A projectile is known as an object that is thrown in the air or shot in the air....for example a rock that is thrown up from a tall building or a missile that is shot from a rocket launcher. A projectile is usually also considered an object that is thrown up and then comes back down.....using the examples above....if a rock is thrown up eventually it is going to have to come down....same thing for the missile.....
I believe the answer is B.
hope this helps :)
