og11（紫）22，关于插入的问题

sugsheng

22、In recent years cattle breeders have increasingly used crossbreeding, in part that their steers should acquire certain characteristics and partly because crossbreeding is said to provide hybrid vigor.
(A)    in part that their steers should acquire certain characteristics
(B)    in part for the acquisition of certain characteristics in their steers
(C)    partly because of their steers acquiring certain characteristics
(D)    partly because certain characteristics should be acquired by their steers
(E)    partly to acquire certain characteristics in their steers



搜了之前的帖子，将原句中 because crossbreeding is said 解释为插入，但我觉得如果把它看作插入很奇怪，怎么翻译呢？感觉crossbreeding is said to 更像一个完整的结构。

sugsheng

各位帮忙看看啦~
有人说应该选D
og给的答案是E