求助一道语法，gwd上的

lvbin19900809

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.

A.
whereas each language occupies a distinct area of the brain in an adult learner,
B.
whereas for adults each language occupies a distinct area of the brain and
C.
each language occupies a distinct area of the brain when they are learned by an adult, while
D.
each language in adults occupied a distinct area of the brain, while
E.
each language occupying a distinct area of the brain for an adult learner, and

在c和e之间纠结，答案是e，但我觉得and前面加了逗号所以，要用it
我在manhattan看到的一句话是：
Wrong：Earl walked to school,and later ate his lunch
Right:     Earl walked to school and later ate his lunch
Right:     Earl walked to school ,and he later ate his lunch.
希望大牛们帮忙解释下，谢谢

无敌西红柿炒蛋

lz确定答案是E吗？
E项中and前是短语 and的后是句子，貌似不合理吧

jj449

我搜了一下，答案应该是A吧？