New data from United States Forest Service ecologists show that for every dollar spent on controlled small-scale burning，forest thinning，and the training of fire-management personnel，it saves seven dollars that would not be spent on having to extinguish big fires.
A.--------
B.that for every dollar spent in controlled small-scale burning，forest thinning，and the training of fire-management personel，seven dollars
are saved that would have been spent on extinguishiing
C.that for every dollar spent in controlled small-scale burning，forest thinning，and the training of fire-management personel saves seven dollars
on not having to extinguish
D.for every dollar spent on controlles samll-scale burning，forest thinning，and the training of fire-manegement personnel，that it saves seven dollars on not having to extinguish
E.for every dollar spent on controlles samll-scale burning，forest thinning，and the training of fire-manegement personnel，that seven dollars are saved that would not have been spent on extinguishing
我觉得这题选C，答案是选B的，但B的话不是两个句子之间用逗号隔开吗？NN们帮忙解释一下
C有几个错误：
1. 由于介词for的使用，句子主语；你说的没错，两个句子应分开，后句，主语+save...
2. on not having to extinguish,这个短语最好成为一个完整的句子
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