Every Spring, Motorists Do More Driving Than During the Winter

Every spring, motorists do more driving than during the winter months. Every spring, the price of petrol increases and the motorists buy more petrol. This experience suggests that the

A) laws of supply and demand are both contradicted for petrol, though only during the spring driving season.
B) "law of demand" does not always hold for necessities like petrol.
C) "law of supply" does not always hold for necessities like petrol.
D) None of the above answers is correct.