参考答案

正确答案：C
解析：由题干中的long shifts和increased accident rates定位到Research一节首句Studies of working hours during the first and second World Wars showed a link between long shifts, overtime working and an absence of rest breaks and increased accident rates．[精析] 段前设题。文章提到，长时间的倒班、加班、缺少休息和事故率的增加是有关系的，但并没有提到糟糕的工作环境导致事故的增加，故本题为NG题。