Answer: The correct answer is Option a.
Explanation:
We are given that two bumper cars hits each other and we need to find the affect caused on first car by the reaction force.
According to the Third Law of Newton,
For every action there is an equal and opposite reaction.
This law actually means that in every interaction, two forces are acting on both the interacting objects.
Hence, the the car collided will move opposite to the direction of action force. Therefore, the correct answer is Option a.