15.   

Even though sub-Saharan Africaoften evokes images of drought and famine, researchers say that the area is thehome of more than 2,000 grains, vegetables, roots, fruits, and other foods thathave the possibility for feeding the continent, even other parts of theworld.

(A) have the possibility forfeeding the continent, even

(B) have the possibility of feedingthe continent, even of

(C) could feed the continent, soeven with

(D) could feed the continentand even

(E) could possibly feed thecontinent and, in addition, for even

语法笔记上说C中的with没有可以和他平行的对象，E中的for没有其他for。。的结构跟他平行
我不太明白是说只要with和for出现了就一定要有东西跟他们平行么？