Competitive runners who run barefoot have been shown to have greater stamina during races than other racers. Therefore, training in bare feet is a useful method to improve competitive runners' chances of winning any race.
Which of the following statements, if true, most seriously weakens this arguments?
(A) Countries in which runners run barefoot often send athletes to the Olympics and to worldwide marathons.
(B) Having greater stamina does not always improve runners' chances of winning races. correct
(C) Many competitive runners train for years to increase their stamina before entering any competitions.
(D) Competitive runners with greater stamina are more likely to win races that are 1500 meters or longer.
(E) The vast majority of competitive runners in training do not train barefoot.
Why is C wrong
Which of the following statements, if true, most seriously weakens this arguments?
(A) Countries in which runners run barefoot often send athletes to the Olympics and to worldwide marathons.
(B) Having greater stamina does not always improve runners' chances of winning races. correct
(C) Many competitive runners train for years to increase their stamina before entering any competitions.
(D) Competitive runners with greater stamina are more likely to win races that are 1500 meters or longer.
(E) The vast majority of competitive runners in training do not train barefoot.
Why is C wrong
