C
题意:
第二段主要讲了什么?
A.为什么残奥会不公平?
B.为什么盲人赛跑选手和坐轮椅的运动员比赛?
C.为什么运动员被分成六组?
D.为什么不同残疾的运动员相互竞争?
根据第二段To make the sports fair,Paralympic athletes are put into six main groups because of their different disabilities. This means that Paralympians with the same or similar disabilities get to compete against each other. It wouldn't be fair,for example,if a blind runner had to compete against an athlete in a wheelchair in the 1 500-metre race.为了使运动公平,残奥会运动员由于残疾的不同被分为六个大组。这意味着具有相同或相似残疾的残奥会运动员可以相互竞争。例如,如果一个盲人跑步者在1500米赛跑中与一个坐轮椅的运动员竞争,这是不公平的。可知,第二段主要讲的是为什么运动员被分成六组,故选C。