Final answer:
Body size and weight, gender, and type of alcoholic beverage consumed are key factors that influence BAC.
Step-by-step explanation:
The key factor that influences blood alcohol concentration (BAC) is body size and weight. When a person consumes alcohol, it gets absorbed into their bloodstream and the BAC rises. Since larger individuals have more blood volume, the same amount of alcohol consumed will be more diluted in their body, resulting in a lower BAC compared to smaller individuals.
Gender is another important factor that influences BAC. Generally, women have a higher BAC compared to men when consuming the same amount of alcohol. This is because women typically have a higher percentage of body fat and lower water content in their bodies, leading to a higher concentration of alcohol in the bloodstream.
The type of alcoholic beverage consumed can also affect BAC. Certain beverages may have a higher alcohol content, resulting in a higher BAC compared to others. For example, consuming shots of hard liquor will lead to a higher BAC compared to drinking the same volume of beer or wine.