那道很经典的湿气导致金字塔关闭的语法题，有一个小疑问看到没什么人问

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那道很经典的湿气导致金字塔关闭的语法题，有一个小疑问看到没什么人问，想咨询一下各位NN。题目先贴出来:

In late 1997,the chambers inside the pyramid of the Pharaoh Menkaure at Giza were closed to visitors fo cleaning and repairing 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 in 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 then 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 mke the salt fron 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.




答案是E我不说了，没任何问题，我有一个小疑问是关于B选项的这个raising，这个raising在B选项中到底有没有错？我看了有些人说不对，说raising的主语是the chambers，不符合逻辑。还有些人说raising的主语是moisture，所以这里raising表示伴随结果没问题。还有人说raising的主语是前面的tourists。
我有点迷糊，求各位NN解答，谢谢

zzz哲哲哲zzz

B 是comma，-ing修饰结构，修饰前面整句话，动作发出者和前面句子的主语一致