Questions 14～16 are based on the following dialogue. You now have 15 seconds to read questions 14～16. How do you set clock if you cross the Atlantic Ocean going east

A．You set you clock ahead one hour in each new time zone.
B．You set you clock ahead one hour for the whole trip.
C．You set you clock back one full day for each time zone.
D．You set your clock ahead by twenty-three hours.