The boss ____ department Ms King worked ten years ago look down upon women

这里选C其实是The boss of the department in which Ms. King worked ten years ago,主句的主语是The boss,而department是属于The boss的，所有关系，所以要用whose,不用which。而之所以要用in是因为work当工作讲是vi，要加介词才能带宾语。如果要选A的话，句子要改为:The boss of the department in which Ms King worked ten years ago…

整个句子的意思为：Ms. King 十年前工作的部门（公司）的老板瞧不起或者歧视女性。照这句话的意思看，楼主的句子look少了个"s",主语为第三人称单数，一般现在时，应为"looks'.