Mark the letter A, B, C or D to indicate the correct response to each of the following exchangesCâu hỏiPhuc: “What factors affect tourism?” - Khanh: “_____________” A. Economic factors are always decisive ones. B. A strong tourism industry brings the country numerous advantages. C. It is influenced by so many things, such as weather, people, and administrative policies. D. People need to be professionally trained to work in tourism industry.