According to ERC supporters, scientists are not reaching their full potential because [A] the European Union is not as competitive as the U. S.. [B] member states cannot cooperate as should have. [C] Europe does not have enough top research institutions. [D] research activities in Europe lack enough competition.
A..
【参考答案】
D 原因细节题。文章第二段尾句说：ERC的支持者认为欧洲研究机构的活动是支离破碎的，因此没有发挥全部潜能。而第三......