The man was dead ——the story A at the end Bby the end of C in the end of

by the end of 是“到......末”的意思，后边跟不同的时间会有不同的含义和用法。
By the end of next month，I will finish reading this book.(到下个月末，我将读完这本书）。
By the end of this week ,I have written two books .(到这个星期末，我已经写了两本书了）
By the end of last month ,I had planted thousands of trees.(到上个月末，我已经种了数千棵树了）

at the end of 后边可以跟时间和地点名词，表示“在......末"
如at the end of this month 在这个月末,at the end of last month ,at the end of next month ,at the end of the road 在路的尽头 等
你这道选择题应该写错吧，A项应该是 at the end of
此句意思为：这个男人在故事的最后死去了。

a

a是对的.
如果用B的话,前面的句子应该是the man had died.过去完成时.
没有C这个答案,只有in the end.

C