According to findings derived from functional magnetic resonance imaging (MRI), the area of the brain in which a second or third language is stored depends on the age of the language learner; whereas each language occupies a distinct area of the brain in an adult learner, language areas overlap in a young child.

1. whereas each language occupies a distinct area of the brain in an adult learner,
2. whereas for adults each language occupies a distinct area of the brain and
3. each language occupies a distinct area of the brain when they are learned by an adult, while
4. each language in adults occupied a distinct area of the brain, while
5. each language occupying a distinct area of the brain for an adult learner, and

选A

哪位NN指点迷津，分析一下这道。

whereas应该怎么用，看到就晕。

感谢了！

Whereas 和although 差不多 表示转折

是个连词~~~~

B选项用了whereas 又用and 显然不对

C选项they没有指代对象

D选项each language in adults 逻辑上好像有点问题

E选项 首先后面出现连词and 说明前半个分句应该是完整的句子~~可是each language occupying a distinct area of the brain for an adult learner 显然没有谓语动词

偶不是nn~~仅供参考

conj.连词：

1.It being the fact that; inasmuch as.
有鉴于：出于…事实，鉴于
2.While at the same time.
同时
3.While on the contrary.
然而；但是；相反

Whereas the peoples of the colonies have been grieved and

burdened with taxes...
鉴于各殖民地民众备受重税负担之苦....
They want a house, whereas we would rather live in a flat.
他们想要一座房子, 而我们宁愿住在一套房间里。

没有什么特别的。

A: whereas each language occupies a distinct area of the brain in an adult learner, language areas overlap in a young child.

平行结构不错。

D: each language in adults occupied a distinct area of the brain, while language areas overlap in a young child.

如果改成each language occupied a distinct area of the brain in an adult learner, while language areas overlap in a young child.还成。