Which of the following cities has the greatest difference in temperature from day to night

A．Beijing, Tianjin, Macao, London, Paris, Toronto
B．Macao, Toronto, New York, Rome
C．Toronto, Rome, Beijing, Chicago
D．London, Rome, Lhasa, Macao, San Francisco

A．Beijing City will be cooler than Berlin.
B．The weather will be fine in most of the listed cities of China.
C．Hong Kong and Macao have stronger wind than other listed cities.
D．Temperatures will be the lowest in Kunming and Lhas