Recently documented examples of neurogenesis, the production of new brain cells, include the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that learn new songs.

(A) the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that

(B) mice whose brains grow when they are placed in a stimulating environment or canaries whose neurons increase when they

(C) mice's brains that grow when they are placed in a stimulating environment or canaries' neurons that increase when they

(D) the brain growth in mice when placed in a stimulating environment or the increase in canaries' neurons when they

(E) brain growth in mice that are placed in a stimulating environment or an increase in neurons in canaries that

D E 不知怎么选择，有什么区别呢？

A: when placed的逻辑主语是production而不是邻近的mice，句意错；动名词growing和increasing应该改成名词growth，increase

B: they指代不明，可以指代brains或mice；第二个they和第一个they不是一个对象

C: they指代brains不对；第二个they和第一个they不是一个对象

D: when placed的逻辑主语是production而不是邻近的mice，句意错；

E: correct

注意：句意理解清楚才能选出答案，而不能仅依赖语法结构的形式平行