Exposure to certain chemicals commonly used in elementary schools as cleaners or pesticides causes allergic reactions in some children. Elementary school nurses in Renston report that the proportion of schoolchildren sent to them for treatment of allergic reactions to those chemicals has increased significantly over the past ten years. Therefore, either Renston’s schoolchildren have been exposed to greater quantities of the chemicals, or they are more sensitive to them than schoolchildren were ten years ago.
Which of the following is an assumption on which the argument depends?
answer is C, but i can't figure out the difference between B and C.
pls let me know.
B说这些孩子不比别的孩子更有可能对别得物质过敏,这个和文章没什么关系.
C说这些孩子不比别得还是更有可能背送去校医那里.取非,那么这些孩子更有可能背送去,我理解为身体更差,那么他们去可能是因为别得病,而不是因为过敏.所以weaken了.C本身得意思么是排除一个可能性,那么就是加强.我是这么理解得,希望有帮助.
B and C are clearly different.
B is not relevant to the original argument.
C, on the other hand, is an assumption of the original argument. Try
deny C, we get "Children who have allergic reactions to the chemicals
are more likely to be sent to a school nurse now than they were ten
years ago." If so, this could have caused most of the reported
increase by nurses, and the original argument that "either Renston’s
schoolchildren have been exposed to greater quantities of the
chemicals, or they are more sensitive to them than schoolchildren were
ten years ago" would fall apart. So, C is an assuptiond the best
answer.
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