Which statement is true regarding the effects of alcohol?

The statement regarding the effects of alcohol that is true is that a couple of beers have about the same effect as a couple of shots of whiskey. This is because both types of alcoholic beverages typically contain similar amounts of alcohol, which is what affects the body. For instance, a standard beer generally has around 5% alcohol by volume, while a common shot of whiskey has about 40%. When consumed in equivalent amounts—such as two beers versus two shots—the alcohol content will yield similar levels of intoxication and impairment, affecting motor skills and judgment.

The other statements might seem plausible at first glance, but they do not accurately reflect the effects of alcohol on individuals. Younger individuals might have a higher tolerance for alcohol, but they can also be just as affected—if not more so—due to factors like body weight and metabolism. Additionally, consuming coffee does not counteract the effects of alcohol; while it might make someone feel more alert, it does not reduce blood alcohol concentration or lessen impairment. Therefore, statement C stands out as the correct choice in understanding the consistent effects of alcohol consumption.