试题要求：
Two swimmers were disqualified because they had started before the official signal was given.
试题解析：
答案：A
解析：
原文：For one reason or another, two of them false started so they were disqualified.
文章提到，由于这样或那样的原因，两个选手在比赛信号开始前抢跑（false started），题干的表述与文章相符，选A。
考点：阅读判断,2015.10
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