During heavy rain, which combination of tools helps improve windshield visibility?

• A. Windshield wipers and defroster.
• B. Turn on high beams.
• C. Open windows.
• D. Use the horn.

Answer: (A)

During heavy rain, you need to both clear rain from the windshield and prevent fogging inside. Windshield wipers physically wipe away the rain from the glass, while the defroster blows warm air across the windshield to reduce interior condensation and keep the glass clear. Together, they maximize visibility through the windshield. Turning on high beams can create glare on wet surfaces and actually reduce visibility; opening the windows can let more rain and wind noise in and doesn’t improve what you see through the glass; the horn doesn’t affect visibility at all.