OG12 语法第10题相关疑问

甜蜜小乌龟

          10. Carnivorous mammals can endure what wouldotherwise be lethal levels of body heat because theyhave a heat-exchange network which kept the brain from getting too hot.

(A)  which kept

(B)  that keeps

(C)  which has kept

(D)  that has been keeping          

(E)  having kept  

Verb form; Rhetorical construction

    The use of the past tense (kept) is incorrectbecause a current situation is discussed; thepresent tense (keeps) is consistent with the otherverbs in the sentence. In (A) and (C), whichintroduces a restrictive clause. Some writersfollow the convention that which can only be usedfor nonrestrictive clauses, but insistence on thisrule is controversial, and both (A) and (C) can berejected on other grounds.
我想问这里对A和C的解释中说 which introduces a restrictive clause. Some writers follow the convention that which can only be used for nonrestrictive clauses,  是不是理解成which在GMAT只能引导非限制性从句，要引导限制性只能用that？

甜蜜小乌龟

有没有好心的cder能给我解答一下呢？  自己顶一个

gogo3

不是的，要根据情况分析，OG上说WHICH引导限定性定语从句有争议，所以应当用其他方法排除