Answer :
Final answer:
Option C, "One 1.5-ounce shot of 80 proof liquor," is considered a standard drink because it closely aligns with the U.S. definition of containing about 14 grams of pure alcohol. Option A and B exceed the volume of a standard drink.
Explanation:
The concept of a "standard drink" is based on the amount of alcohol that is contained in different beverages, not necessarily the volume of the beverage itself. In the United States, a standard drink contains about 14 grams of pure alcohol. Here is how different drinks compare:
- A standard glass of wine is usually 5 ounces, with a typical alcohol content of 12% ethanol.
- A standard beer is 12 ounces with about 5% alcohol.
- A shot is 1.5 ounces of distilled spirits, or liquor, at 40% alcohol or 80 proof.
Given these definitions, option C, "One 1.5-ounce shot of 80 proof liquor", would be considered a standard drink because it adheres to the standard drink definition.
Options A and B exceed the typical size and alcohol content of a standard drink. One 8-ounce glass of wine contains more than the standard 5 ounces, and one 20-ounce bottle of beer is almost double the standard 12 ounces. Both of these contain more alcohol than a single standard drink.
