What should you do when it is raining at night?

Answer: D — Decrease your speed and increase your following distance

When it is raining at night, it is important to decrease your speed and increase your following distance. Driving the same speed as in normal conditions (A) can be dangerous because rainfall can reduce visibility and make roads slippery. Increasing your speed (B) can also increase the risk of hydroplaning, where your car loses contact with the road and can cause you to lose control. Similarly, increasing your following distance (C) may not be helpful in preventing accidents as it does not reduce your speed. Therefore, the best course of action is to decrease your speed and increase your following distance (D) to ensure a safe driving experience during rain at night.