Answer:
Choice A best supports the claim.
Choice A is the only choice that explicitly states valuable reasons for why pickup trucks are more useful than cars.
Choice B is wrong because it goes in favor of cars, not pickup trucks.
Choice C doesn't add anything meaningful to the claim and implies that both pickup trucks and cars are useful, not that one is better than the other.
Choice D doesn't make sense. Cars can be painted any color of the rainbow as well.