What is a common cause of tire blowouts?

Answer: D — Both A and C

Under-inflation of tires is a significant factor that contributes to tire blowouts. When a tire is under-inflated, it creates extra heat as the tire flexes more than it should while rolling. This excessive heat can lead to a breakdown of the tire materials, causing a blowout. Additionally, driving at excessive speeds increases the risk of tire failure. Higher speeds generate more heat and exert greater stress on the tires, making them more susceptible to blowouts. Therefore, both under-inflation and excessive speed work together to significantly increase the likelihood of tire blowouts, making this the most comprehensive and accurate choice.