问一道新东方补充材料语法题（第400题）

请教各位大哥大姐

一道新东方补充材料语法题（第400题）

Rembrandt so treasured his collection of Islamic portraits that when forced to sell them in order to raise money, he first made copies of more than twenty.

A. he first made copies of more than twenty

B. first he made copies of more than twenty

C. more than twenty were copied

D. copies of more than twenty were made

E. he copies more than twenty of them first

答案是A

请解释一下其他选项不对的原因

谢谢

首先first在文中的位置不可轻易改变（除非有明显的逻辑错误），注意其强调语气；

when后面的forced to sell，决定了逻辑主语只能是人，排除C、D；

E中时态错误；还有其他错误，没有一一列举。