单项选择题

On July 1 st the ratio of men to women in club X was 9 to 20．During the month．2additional men and 2 additional women joined the club，and no members dropped out．（）

A、if the quantity in Column A is greater;
B、if the quantity in Column B is greater;
C、if the two quantities are equal;
D、 if the relationship cannot be determined from the information given.

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单项选择题

After a store had sold k television sets for p dollars each，it reduced the price p of each set by 5 percent and then sold twice as many sets at this reduced price．（）

A、if the quantity in Column A is greater;
B、if the quantity in Column B is greater;
C、if the two quantities are equal;
D、 if the relationship cannot be determined from the information given.

单项选择题

Three salespeople are paid commissions in proportion to the amount of their sales，which total $25，000， $40，000， and$60，000， respectively． If a total of$20，000 is allocated for these three commission，what is the amount of the largest commission paid？（）

A. $8，000
B. $8，400
C. $9，600
D. $10，000
E. $12，000