Two cars experience a collision on a city road. Both drivers are using their brakes when the cars hit. Which statement is true?Using the impulse approximation, conservation of momentum can be applied to the very brief time period of the collision itself (giving approximate results). Unselected Conservation of momentum cannot be applied at all. Unselected Friction from the road does not change the fact that the momentum of the two cars will be perfectly conserved during the collision. Unselected Using the momentum approximation, conservation of momentum can be applied to the time period leading up to the collision (giving approximate results) but not to the collision itself