When Driving Down a Level Smooth Road, Your Car Tires

When driving down a level smooth road, your car tires flatten at the bottom and they nicely support the weight of your car. However when you run over a small pointed rock the tire is punctured and fails. The rock is able to puncture the tire because

A) the car has much more kinetic energy when on the rock than when on the flat road and this kinetic energy becomes potential energy in the tire.
B) when the car is on the rock almost all its weight is on the tire over the rock.
C) the car has much more gravitational potential energy when on the rock than when on the flat road and this gravitational potential energy becomes pressure potential energy in the tire.
D) the small surface area of the rock times the pressure in the tire is not enough force to support the car. Thus, the tire fails.