GWD 29-8

Which of the following, if true, provides evidence that most logically completes the argument below?

According to a widely held economic hypothesis, imposing strict environmental regulations reduces economic growth.  This hypothesis is undermined by the fact that the states with the strictest environmental regulations also have the highest economic growth.  This fact does not show that environmental regulations promote growth, however, since ______.

1. those states with the strictest environmental regulations invest the most in education and job training
                       
2. even those states that have only moderately strict environmental regulations have higher growth than those with the least-strict regulations
3. many states that are experiencing reduced economic growth are considering weakening their environmental regulations
                       无关

4. after introducing stricter environmental regulations, many states experienced increased economic growth
                       不构成因果关系，与原文衔接不上

5. even those states with very weak environmental regulations have experienced at least some growth与原文衔接不上

答案是A,可是我怎么看都怎么觉得A是无关选项,而且意思特别绕.请大牛指点

A是他因

告诉我们其它虽然有严苛的制度，但人家通过增加教育和工作培训，人才增加了，经济就变好了。人才才是第一生产力！

A是证明他因存在