What should you do if you discover that the coolant in the vehicle radiator needs topping up during a long journey?

Possible Answers:

a. Hose down the engine to cool it before refilling

b. Let it cool before removing the filler cap

c. Keep the engine running and fill it with coolant immediately

d. Keep driving, as the fan will cool the engine

Think you know the answer to this theory test question?

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