大全-c-13

13.   In general, a professional athlete is offered a million-dollar contract only if he or she has just completed an unusually successful season. However, a study shows that an athlete signing such a contract usually suffers a decline in performance the following season. This study supports the theory that a million-dollar contract tends to weaken an athlete’s desire to excel by diminishing his or her economic incentive.

Which of the following, if true, would most strengthen the conclusion drawn above? (A) On the average, athletes whose contracts call for relatively small salaries with possible bonuses for outstanding achievement perform better than other athletes.

(B) Athletes are generally offered million-dollar contracts mainly because of the increased ticket sales and other revenues they generate.

(C) Many professional athletes have careers marked by year-to-year fluctuations in their overall levels of performance.

(D) On the average, higher-salaried athletes tend to have longer and more successful professional careers than do lower-salaried athletes.（A）

(E) Six of the ten leading batters in the National League this season signed million-dollar contracts during the off-season.

这题我是作对了的，可是可能是因为做题太多了的缘故，连自己的搞不清逻辑关系了，不知道什么推什么了，只是凭直觉知道就是A对，请那位NN把原题目的逻辑关系和A是如何加强的方式列一下。

拜谢

不是NN  ,  

原文说一百万使运动员追求突破的欲望下降 因为降低了他的经济因素 即经济因素影响了表现

A 要求较少的薪资而有杰出表现时有额外奖金的运动员 表现的比其他运动员好    也说明了经济因素影响了表现 Support

请教C错在哪了？

如果运动员的表现都是完全稳定的，没有任何波动，那就说明题目错了呀。C正好说明了确实有运动员会成绩波动，不就strengthen了吗？

浅见,

结论是因为工资太多,表现好所得奖金就相对少了,导致成绩下降.

A说工资少但奖金多表现好,说明是奖金起了作用.所以是加强.

C是无关选项,他意思是成绩与金钱无关与周期有关,实际上结论是有正比例关系

This study supports the theory that a million-dollar contract tends to weaken an athlete’s desire to excel by diminishing his or her economic incentive.

若C对的话， 不就否定了结论吗？year-to-year fluctuations 而不是a million-dollar contract 会weaken运动员.