Final answer:
Caffeine can mask the depressant effects of alcohol, making a person feel less impaired, but it does not affect the liver's ability to metabolize alcohol, which occurs at a consistent rate.
Step-by-step explanation:
The statement that the caffeine in alcohol mixed with energy drinks may mask the depressant effects of alcohol is true. However, it is also true that caffeine has no effect on the liver's metabolism of alcohol. The liver is responsible for metabolizing alcohol, and this process occurs at a consistent rate, regardless of the consumption of substances like caffeine. Therefore, while caffeine can lead to a perception of being less impaired due to its stimulating effects, it does not change how quickly the body can process and eliminate alcohol.