问题如下：
Country X make long-term policy in order to sustained development of national economy, creating jobs, perfecting business laws and regulations, and launching a new capital gain tax on foreign investors. Which of the following factors is most likely to be an adverse factor?
选项： Capital gain tax.
Creating jobs.
C.Business laws.
解释：
A is correct.
考点：各种factor对经济增长的影响。
解析：健全的法律制定和更多的工作机会都是对经济增长有利的因素。
A选项对外国投资者的资本利得税会阻碍外国投资者到本国的投资热情，这是对经济增长不利的影响因素。
虽然做对了题，但是正确的选项仍然觉得不够正确。 launching a new capital gain tax on foreign investors，只是说new，并没有说higher。万一是lower tax呢？
