单选题 Later in this chapter, cases ______consumer complaints have resulted in changes in the law, are presented.
A. where B. when C. who D. which

【正确答案】 A
【答案解析】句意：在本章后面部分介绍了由于消费者投诉而导致法律修改的案件。Where=in which，引导从句修饰cases。