If two cars collide head-on with equal force, what will be the effect on their motion?

A.) Both cars exert forces on each other that are equal in magnitude but in opposite directions.
B.) One car exerts a stronger force than the other but in the opposite direction.
C.) One car exerts a stronger force than the other but in the same direction.
D.) Both cars exert forces on each other that are equal in magnitude and in the same direction.