What is the correct minimum driving distance between cars?

Answer: C — 4 feet

It is important to maintain a safe distance between vehicles while driving. Option A (2 feet) is not sufficient as it does not allow for enough reaction time in case of sudden stops or changes in traffic. Option B (3 feet) is also not ideal as it still does not provide enough space for emergency maneuvers. Option D (5 feet) is too conservative and can cause unnecessary traffic congestion. Option C (4 feet) strikes a good balance between safety and efficiency, allowing for enough distance while still maintaining a smooth flow of traffic.