Answer:
A: The car has more momentum
Step-by-step explanation:
When we discuss collisions, we are usually referring to a change in momentum. If a car crashes into a wall, then all the momentum that the car had acts on the wall and either decreases (this is where a car would drive through a wall), or change to zero (where the wall would withstand the force).
In this case, the bug and the car have different values of momentum. The car obviously has more because it is both heavier and can be assumed to be travelling a lot faster, this means that there is a negligible amount of force in the opposite, from the bug.