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432. Which of the following is the most correct behavior of a driver to prepare for the long-distance driving during the rainy season?
- Replace the antifreeze with distilled water for use as engine coolant.
- Reduce the air pressure of tires to improve fuel economy as much as possible.
- Place the insurance certificate to prepare for the submerging of a vehicle.
- Wipe the vehicle window with the defrost agent used during winter time.
Answer : 4