Final answer:
In the United States, the legal drinking age is twenty-one and a guest over 21 years old may purchase and consume alcoholic drinks in moderation.
Step-by-step explanation:
The National Minimum Drinking Age Act of 1984 requires states to raise their drinking age to twenty-one or face a reduction in federal highway funds. As a result, the legal drinking age in the United States is twenty-one.
Therefore, a guest over 21 years old may purchase and consume alcoholic drinks in moderation. According to guidelines, women should limit themselves to one drink per day, while men should limit themselves to two drinks per day. It is important to drink responsibly and be mindful of the potential effects of alcohol on one's health and well-being.