The World Tourism Organization is ______ that represents all nat

The World Tourism Organization is ______ that represents all national and official tourist interests.
A、a regional organization
B、one of the organizations
C、a national organization
D、the only international organization
【正确答案】：D
【题目解析】：D. the only international organization（唯一的国际组织）：这个选项明确指出了世界旅游组织的国际性和独特性。虽然可能还有其他国际组织也涉及旅游领域，但世界旅游组织在代表全球各国和官方旅游利益方面确实具有独特的地位。