单项选择题
In truth, there are no easy answers to the dilemmas posed by mass tourism. Awareness, certainly, is a step forward—the knowledge of what is means to be a tourist. With that comes the ability to make better choices, where and how and even whether to travel. An increasing number of nonprofit organizations offer working holidays, in which the economic and social asymmetries that lie at the heart of the holiday industry are somewhat redressed. The tourist takes but also gives. Among the best-known is the research organization Earthwatch.
A、It's not easy to solve problems posed by mass tourism.
B、What is awareness.
C、Working holiday can sovle the problems posed by mass tourism.
D、It's impossible to solve the problems posed by mass tourism.
