50. Patty is traveling in the UK now. What may happen during hertrip?
(A)When she eats hamburgers at McDonald’s, she has to tipthe clerk.
(B) There is no need for her to tip if she has a terrible meal andthe service is really bad.
(C) The waiter may run out of the restaurant right away andgive the tip back to her.
(D)When she orders at the counter in a restaurant, she must paymore money for her meal.