Prep 2012 CR第65题，请教指导

forevercaesar

不好意思请教一下，这C选项怎么选出来的啊？多谢了
The percentage of households with an annual income of more than $40,000 is higher in Merton County than in any
other county. However, the percentage of households with an annual income of $60,000 or more is higher in
Sommer County.
If the statements above are true, which of the following must also be true?
A.  The percentage of households with an annual income of $80,000 is higher in Sommer County than in Merton
County.
B.  Merton County has the second-highest percentage of households with an annual income of $60,000 or more.
C. Correct The percentage of households with an annual income between $40,000 and $60,000 is higher in Merton County
than in Sommer County.
D.  The total number of households with an annual income of more than $40,000 is greater in Merton County than
in Sommer County.
E.  Average annual household income is higher in Sommer County than in Merton County.

xiqiong

纯粹的数学题。LZ再想想。不明白再问。