What is a common health consequence of high BAC levels?

High blood alcohol concentration (BAC) levels can significantly impair various bodily functions, and one of the common health consequences is reduced liver function. The liver plays a crucial role in metabolizing alcohol, and when exposed to high levels consistently, it can become overwhelmed and unable to process alcohol effectively. This can lead to conditions such as fatty liver, hepatitis, or even cirrhosis over time. These liver issues can impair the body's ability to detoxify, leading to a host of other health problems.

The other options describe effects that are either inaccurate or misleading. Enhanced cognitive function and improved motor skills are both false assertions, as high BAC levels typically impair those abilities. While increased heart rate can occur due to alcohol's stimulant effects at low levels, at high BAC levels, the overall impact is more often related to central nervous system depression rather than an increase in heart rate. Overall, the reduction in liver function is a clear and significant consequence of high BAC levels.