第28题: [单项选择]While studying those couples who got divorced and those who stayed married, all the following factors were included EXCEPT ______ A. ethnical background B. sex C. education D. salary 参考答案:C 答案解析:细节推理题。该题主要考查对于本文第四段第二句话的理解。这句话的意思是研究结果考虑到了包括种族、年龄、性别和收入在内的多种因素,并未提到教育因素,所以正确答案自然选择C。