问题
选择题
Helen was much kinder to her youngest child than she was to the others， ，of course，made the others jealous．
A．who
B．that
C．which
D．what
答案
答案：C
题目分析:句意：海伦对她最小的孩子比别的孩子好，当然这使得其他孩子很嫉妒。分析结构可知此处是非限制性定语从句，排除BD选项，从句中缺少主语，指代前句话的内容，故答案选C。