GWD-30-1

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

答案是C

我的疑问是 was being arranged也可以的吗？请教各位nn

但是总觉得这样的语态GMAT不常用吧？？？

是不常用，但比其他选项都好。