1.The journey around the world took the old sailor nine mont

1.The journey around the world took the old sailor nine months,_______ the sailing time was 226days.
A.of which B.during which
C.from which D.for which
把后面的 of which the sailing time was 226days.改成一个句子就是 the sailing time of the nine months was 226 days.
根据 of the nine months 应该是of the which 为什么答案就是of which呢?不是有the的嘛!不知你是否理解我的意思／愿听解释.