✔ 最佳答案
First of all , the private consumption (C) will increase . Since the resident of
country A will stay in country A and spend more money on their economy , the GDP will improve .
Then , developing of the tourist sport will increase the government expenditure (G) or the investment (I) , I don' t know the tourist sport are developed by who either one of them , but it will also improve the GDP
Lastly , the increasing number of tourist will rise the export (X) ,during their journey, they will buy good in country A , therefore , the GDP also improved by the foreigner .
In short , the GDP will improve by these three factors