请教新东方语法教程21的一道题

william_T

12. By focusing on the interesting, ______ the significant, the penny press newpapers of the 1830's helped to change the concept of news.

(A) which dose not necessarily

(B) not necessarily

(C) was not necessarily

(D) nor necessarily being

答案是B。但是我想不明白necessarily怎么能够修饰名词性的“the significant”呢？请各位赐教。

pumpkin

necessarily是修饰focus的。

william_T

可是not necessarily后面没用逗号与the significant隔开啊,这样可以的吗?

还有the significant在句中作什么成分呢?

谢谢pumpkin,请继续指点.