Critical Reasoning

Hello Friends,
I have just started preparing for GMAT.
Do help me out on this one.
It would be nice if explanation is given as well.


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

conclusion: million-dollar contract tends to weaken an athlete's desire to excel by diminishing his or her economic incentive.
a)
b)unusually successful athletes get million dollar contract.
c) this provides another reason for decline in performance. and thus weaken the argument.
d)high salaried have longer and successful career. This against the argument (high pay means athlete performs better)
e)irrelevant
IMO A

Thanks Cans.
A is indeed the right answer.

Good explanation Cans A indeed is the answer

Sanjay2706 wrote:Hello Friends,
I have just started preparing for GMAT.
Do help me out on this one.
It would be nice if explanation is given as well.


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

IMO A
Rest of the options are irrelevant.