题目内容：

有点迷惑!宾主从句的问题
Jack's dream was to have his own shop___to produce the working of his hands.
A:in which B:by which C:that
我肯定能选出来是A,但是这是宾语从句,后面引导词后面的是一个句子吗?该如何分析呢?望指教!