Answer and explanation

Correct answer: D. Impairment greatly increases the risk of accidents

  1. Step 1: Alcohol, drugs and some medicines slow reactions and judgement. Step 2. Working under their influence endangers everyone, so sites set rules and testing. Answer: Impairment greatly increases the risk of accidents. Why not the others: The policy is not about social life, medicines are not all banned and insurance costs do not fall to zero.

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