It stormed all day,during (which) time the ship broke up.括号里填此词原因It stormed all day,during （which） time the ship broke up.暴风雨持续了一整天；就在这段时间里船破裂了.A.thisB.thatC.whichD.what 为什么选C?求

It stormed all day,during (which) time the ship broke up.括号里填此词原因
It stormed all day,during （which） time the ship broke up.
暴风雨持续了一整天；就在这段时间里船破裂了.
A.thisB.thatC.whichD.what
为什么选C?求详解

这题during是关键.
当句中出现介词时,只能用which.