求教一道语法题！！！看之前的帖子都没看懂

richygogogo

In late 1997, the chambers inside the pyramid of the Pharaoh Menkaure at Giza were closed to visitors for cleaning and repair due to moisture exhaled by tourists, which raised its humidity to such levels so that salt from the stone was crystallizing and fungus was growing on the walls.

(A)    due to moisture exhaled by tourists, which raised its humidity to such levels so that salt from the stone was crystallizing
(B)    due to moisture that tourists had exhaled,  thereby raising its humidity to such levels that salt from the stone would crystallize
(C)    because tourists were exhaling moisture, which had raised the humidity within them to levels such that salt from the stone would crystallize
(D)    because of moisture that was exhaled by tourists  raising the humidity within them to levels so high as to make the salt from the stone crystallize
(E)    because moisture exhaled by tourists had raised  the humidity within them to such levels that salt from the stone was crystallizing
我知道E是最好的，但是有几个问题：1，A选项中的which有没有指代不清的问题，我看og没有说这条所以想问一下；2，为什么og上面说C,D选项them是指代tourists，而不是指代Chambers，但是E里面的them就是指代Chambers，所以C,Dthem指代歧义，E没有指代歧义，为什么？3，due to在GMAT里面是不能作为正确表因果的连词吗？求大神指教！！！！

VincentFSJ

OG上面的答案都是模棱两可的，这里面C的中心偏移了，because后面的和前面完全没有逻辑关系；D里面这个them问题不大，关键是后面的没有划线的句子被扔了，在全句看就没有合适的位置。

LIKEAGOLDEN

1， 这里的which只能只带tourists，不能指代前面的一整句话，所以存在指代不清的情况。
2，这里的them的问题，OG上很多这样的答案都是自己和自己矛盾的，忽略掉就好了。
3，due to 在GMAT语法中的结题方式是这样子的，将due to换成caused by，如果原句中caused by可以试用，那么due to也可以适用。

锕儍

1. which指代紧邻的noun/pronoun，所以确实是tourist
2. 我觉得最重要的区别在于E选项中exhaled by tourists是一个modifier而不像C或D做subject或object，所以E中them不太可能指代到tourists那里去。不过还需要再参考其他题目才能得到定论，我也不是很确定。

richygogogo

大神，我想问一下A里面的which可以跳过exhaled by tourists指代moisture吗？这个跳跃指代总是分不清什么时候可以跳跃