Whichofthefollowingareinternationallyrenownedfreetradeportsintheworld（）

Whichofthefollowingareinternationallyrenownedfreetradeportsintheworld（） A. HongKong，SingaporeandDubai B. Shenzhen,ItalyandtheUSA C. Xiamen,SpainandAustralia D. Zhuhai,MacanandTokyo