Final answer:
Only time can reduce the alcohol level and the effects from the body because alcohol metabolism occurs at a constant rate regulated by the liver's enzymatic capacity, and can't be expedited by consuming other substances.
Step-by-step explanation:
The correct answer to the question is that only time can reduce the alcohol level and the effects from the body. This is because alcohol metabolism in the body is a process that occurs at a consistent rate, governed by the liver's ability to metabolize alcohol, and is not sped up by consuming other substances such as caffeine or eating foods. The liver metabolizes alcohol by converting ethanol to acetaldehyde and then to other products. The amount of alcohol dehydrogenase enzyme in a person's liver, along with individual factors such as body size, sex, and pre-existing health conditions, can affect the rate at which alcohol is metabolized, but overall, this process cannot be hurried. Drinking alcohol also inhibits the production of antidiuretic hormone, leading to increased urination and risk of dehydration, which further illustrates that the body requires time to recover from alcohol consumption.