单项选择题A．A customer has to tip the waitress.B．A customer has to pay each time he gets drinks.C．A customer has to pay for all the drinks when he is leaving.D．A customer has t9 sit at the table to wait for their turn to be serve

单项选择题A．protectionism would hurt AmericaB．globalization would be harmful to AmericaC．more and more people would lose their jobsD．the prices would increase by 12 percent