再问OG12 SC6 them的指代

haonan15110

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.

(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

答案E

C The pronoun them seems to refer to tourists, which is nonsensical; the entire construction is awkward and wordy; would crystallize is not parallel to was growing.
D Once again, them seems to refer to tourists; the entire construction is awkward, wordy, and ambiguous; crystallize is not parallel to was growing.
E Correct. The causal sequence is clear, and them clearly refers to chambers.

为什么 C D 的them指代tourists， 而E的them指代chambers

liberzephyr

代词优先指代 主句的主语 the chambers

haonan15110

但C，D 中就近指代tourists

liberzephyr

所以不选CD呀

miller811

代词不是绝对错误

tracy1991

http://gmatclub.com/forum/og12-sc-6-chambers-84701.html

FactOrFiction

我认为这里的11楼是对的.

http://forum.chasedream.com/GMAT_SC/thread-481237-2-1.html#last