急救:一道语法题目!!!!:)谢谢

The artist Renoir's last word was"flowers",spoken as they arranged a bouquet of roses just picked from his garden in a vase on his bedroom windowsill.

A as they arranged a bouquet of roses just picked from his garden

B as a bouquet of roses had been just picked from his garden and was being arranged

C as a bouquet of roses just picked from his garden was being arranged

D  during the arrangement of a bouquet of roses just picked from his garden

E  while they arranged a bouquet of roses that had just been picked from his garden.

为什么答案是c啊 ?谢谢

A，E的they没有指代，首先应该排除

B中and并列连接连个动词时态不一致，而且有没有相应的时间状语提供解释，错！

D.spoken 后面接了漫长的短语，表达很混乱！~还是主谓结构简单明了