Final answer:
Individuals under 21 are not legally allowed to consume alcohol in the United States according to the National Minimum Drinking Age Act of 1984, thus the correct answer is a. 0 drinks.
Step-by-step explanation:
The question deals with the legal limits for alcohol consumption by individuals under the age of 21 in the United States. The right answer to the question, a. 0. According to the National Minimum Drinking Age Act of 1984, individuals under the age of 21 are not legally permitted to consume alcohol. This legislation was reinforced by organizations such as Mothers Against D.runk Driving (MADD) to combat intoxicated driving and promote public safety. It's important to note that alcohol intoxication typically begins after the consumption of more than two drinks and that any alcohol consumption by those under the legal drinking age is illegal in the United States, with BAC (blood alcohol concentration) limits set to define legal intoxication for drivers.