What type of headlights must be dimmed when following another driver?

Answer: B — High beam headlights

When following another driver, it's essential to dim high beam headlights to prevent blinding the vehicle in front of you. High beams provide greater illumination and are designed for use in dark, open areas where there are no oncoming vehicles or cars in front. However, when you are following another vehicle closely, using high beams can create glare in their mirrors, which can be distracting and dangerous. This is why it is important to switch to low beam headlights in such situations. Low beams are designed to illuminate the road directly in front of your vehicle without creating excessive glare for other drivers. They provide adequate visibility while ensuring the safety of others on the road. Therefore, dimming high beams when following another driver is a critical aspect of responsible driving practices.