This is a weakening type question.
A) simply proclaims that there is another reason to explain the economic growth. Whether investment in eduation and job training would lead to economic growth is not proven right or wrong. But it is a possible reason. That is enough to cast an unfavorable light on the hypothesis the author is trying to undermine.
-- by 会员 sdcar2010 (2011/6/11 20:03:38)