The WTO has suggested several _____ for domestic tourism definit

The WTO has suggested several _____ for domestic tourism definitions.
A、guidelines
B、regulations
C、policies
D、facilities
【正确答案】：A
【题目解析】：A. guidelines - 意为“指导方针”或“指南”，是建议或推荐的行为或思考方式，通常不强制但具有指导性。在此上下文中，WTO可能为国内旅游定义提供了一些建议性的指导方针。