All of the above
When a person drinks an alcoholic beverage, about 20 percent of the alcohol is absorbed in the stomach and about 80 percent is absorbed in the small intestine. How fast the alcohol is absorbed depends upon several things:The concentration of alcohol in the beverage: the greater the concentration, the faster the absorption.The type of drink: carbonated beverages tend to speed up the absorption of alcohol.Whether the stomach is empty or full: food slows down alcohol absorption.