[求助]buchong111

111.     Too
old to bear arms himself, Frederick Douglass served as a recruiting agent, traveled
through the North to exhort Black men to join the Union army.

(A) traveled
through the North to exhort

(B) and he
traveled through the North and exhorted

(C) and traveling
through the North exhorted

(D) traveling
through the North and exhorted（E）




(E) traveling through
the North and exhorting



the answer is e,but i chose a

从平行来讲，一定是选E

但是e似乎改变了原意？

traveled through the North to exhort

我最初的理解是traveled是served的同位语，to exhort表示travel的目的。

但是看到答案以后觉得traveling是用来解释served as a recruiting agent,只是觉得如果把and exhorting改为to exhort会不会更好？

盼望解答～