Question: How do you prevent your teeth from getting stained?

  Options: 
 A. Rinse your mouth with water within half an hour of eating or drinking these stain-causing foods and drinks, giving them less time to do their damage. Brushing your teeth: Brushing your teeth soon after eating is the best way to prevent discoloration from foods and drinks.
 B. Rinse your mouth with water within half an hour of eating or drinking these stain-causing foods and drinks, giving them less time to do their damage. Brushing your teeth: Brushing your teeth long after eating is the best way to prevent discoloration from foods and drinks.
Answer: A