Rita and John Both Had 2 Shots of Vodka, but Rita's

Rita and John both had 2 shots of vodka, but Rita's blood alcohol level is higher than John's. Which of the following explains in better the difference between Rita's and her friend's reactions to the alcohol they consumed?

A) Women absorb about 30% more alcohol into their bloodstream than men do.
B) Rita may have eaten a meal high in protein and fat prior to drinking.
C) Rita is younger than John.
D) Rita may have drank her vodka slower than John did.