求助一道OG2012 verbal分册上的SC题 Q110

lbhvista0920

Although Napoleon’s army entered Russia with far more supplies than they had in their previous campaigns, it had provisions for only twenty-four days.
(A) they had in their previous campaigns,
(B) their previous campaigns had had,
(C) they had for any previous campaign,
(D) in their previous campaigns,
(E) for any previous campaign,

答案是E 求问这个E是什么比较项？平时没有注意到这个知识点，如果有相关总结就更多谢啦！！！