求助feiei-134

134. The more television children watch, the less competent they are in mathematical knowledge. More than a third of children in the United States watch television for more than five hours a day; in South Korea the figure is only 7 percent. But whereas less than 15 percent of children in the United States understand advanced measurement and geometric concepts, 40 percent of South Korean children are competent in these areas. Therefore, if United States children are to do well in mathematics, they must watch less television.

Which one of the following is an assumption upon in advanced measurement and geometric concepts than are South Korean children?

A.       Children in the United States are less interested in advanced measurement and geometric concepts than are South Korean children.

B.        South Korean children are more disciplined about doing schoolwork than are

C.        Children who want to do well in advanced measurement and geometry will watch less television.

D.       A child’s ability in advanced measurement and geometry increases if he or she watches less than one hour of television a day.

E.        The instruction in advanced measurement and geometric concepts available to children in the United States is not substantially worse than that available to South Korean children.

我读不懂问题要问什么，希望哪位好心人帮忙指点一下。

Before going into a more detailed discussion, here is one trick (courtesy of Lawyer's Gmat CR summary): For assumption question, whenever the question is comparing two cases and showing differece between those two, the answer, on most time, should be the one saying some similarity between the two different cases.

Onto this question, this is a typical causal oversimplication question, the author assume watching tv is the one and the only factor that will affect that children's level of Math. So to find the answer, we need to keep in mind that we need to rule out any other causes by selecting the right logic enclosed in each option.

A: if this is true, then watching less tv will not make any positive progress. because US in general do not like math. WRONG

B: Again, this option provides us yet another factor that can affect the effectiveness of author's strategy. WRONG

C: THis is the attractive "incorrect answer". But the author assumes the opposite: children who watch less tv will do well.

D: This is flat-out irrelevent.

E: This is the ANSWER. like said above, this option rules out any other possible explainations and gives ground to the author's theory.