According to the faculty psychologists, understanding and memorization of complicated grammatical rules of languages were regarded as important means of developing ______.

下列有关临界点的叙述，错误的是( )。

A．临界点是指不确定因素的极限变化

B．当不确定因素变化超过了临界点时，表明项目将由可行变为不可行

C．临界点高低与设定的基准收益率有关，在一定的基准收益率下，临界点越低越说明该因素对项目效益的指标影响越小

D．可以通过敏感性分析图求得临界点的近似值