Driving in snowy and icy conditions can be dangerous as it increases stopping distances. The stopping distance represents how far a car will travel before slowing down to a halt. It is made up of the thinking distance, which is how long it takes for a driver to react, and the braking distance, which represents the time taken for the brakes to fully stop the car. It is advised to fit winter tyres during the winter season as these have much better grip on snow and ice. These tyres are made out of a softer material than regular tyres, allowing them to have more traction at colder temperatures. This ultimately reduces the braking distance. As the brakes are not very effective at stopping a vehicle on icy roads, it is recommended to steer out of trouble if possible rather than applying the brakes. It is therefore important to be travelling at slower speeds to avoid the need to suddenly brake. If the car is stuck and cannot move, the driver can stay warm by running the engine to generate heat. However, if the exhaust pipe becomes blocked by snow and the fumes cannot escape then the engine must be turned off. This is because the engine produces carbon monoxide, which is extremely toxic and odourless.

Question: It is dangerous to use winter tyres in hot summer conditions.
Options:
A. true, B. false, C. uncertain
Answer: "C"