(单选题)

Which of the following is seen as the cause of class differences in the past? ( )

A.Life style and occupation.

B.Attitude and income.

C.Income and job security.

D.Job security and hobbies.

参考答案：C

参考解析：

根据第二段In the past, the working class tended to be paid less than middle-class people......As a result of this and also of the fact that workers' jobs were generally much less secure......可知在过去，工人阶级的工资往往低于中产阶级，如教师和医生。由于这一点，也由于工人的工作普遍缺乏保障，生活方式和态度出现了明显的差异。即根源是收入和工作的保障性。故本题正确答案选C。

知识点：细节题英语阅读理解通用英语