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As blood-alcohol levels rise, what becomes more difficult for a person?

  1. Coordinating movements and reflexes

  2. Sleeping

  3. Speaking loudly

  4. Remembering names

The correct answer is: Coordinating movements and reflexes

As blood-alcohol levels rise, the ability to coordinate movements and reflexes becomes more difficult for a person. This is due to the fact that alcohol acts as a central nervous system depressant, slowing down the brain's ability to control muscle movements and reaction times. It can also impair balance and coordination, making it difficult to perform tasks that require fine motor skills. While sleeping, speaking loudly, and remembering names may also become more difficult with increased levels of alcohol in the bloodstream, these are not the primary effects and do not directly impact coordination and reflexes like option A does.