How many ounces of beer does it take for a person to be legally intoxicated?

The correct answer is based on the standard beverage serving size used in determining blood alcohol concentration (BAC) for legal intoxication. Typically, one standard drink is defined as containing approximately 0.6 ounces of pure alcohol. In the case of beer, a standard serving is generally accepted to be 12 ounces for beer with an alcohol by volume (ABV) of around 5%.

To reach the legal limit of 0.08% BAC in many jurisdictions, an average-sized adult might find that consuming a 12-ounce beer in a short period could lead them to that level of intoxication, especially if they have a low body weight or are not accustomed to drinking. Therefore, the answer of 12 ounces is supported by this standard measurement used in discussions of alcohol consumption and legal intoxication limits. The other options, being smaller amounts, would not typically be sufficient to elevate a person's BAC to the legal limit for many individuals.