How should the two-second gap change on a wet road?

Answer and explanation

Correct answer: D. It should be at least doubled

  1. Step 1: On wet roads stopping distances are about double, so the gap should at least double.
Answer
It should be at least doubled.
Why not the others: It should be halved on a wet road, It should stay the same on any road and It does not apply when the road is wet don't fit.

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