As China's economy shifts to a more market system, the domestic

As China's economy shifts to a more market system, the domestic travel industry will face increasing _____ in a more highly competitive environment.
A、changes
B、charges
C、challenges
D、chances
【正确答案】：C
【题目解析】：随着中国经济向更加市场化的体系转型，国内旅游业将面临更加激烈的竞争环境下的挑战。