Oberlin College in Ohio was a renegade institution at its 1833 founding for deciding to accept both men and women as students.

(A) at its 1833 founding for deciding to accept

(B) for the decision at its 1833 founding to accept

(C) when it was founded in 1833 for its decision to accept

(D) in deciding at its founding in 1833 to accept（D）

(E) by deciding at its founding in 1833 on the acceptance of,

答案是d,我不明白其中的道理,我选了c,理由是为避免修饰不清楚.请指教!

起先有点觉得d中的不定式修饰不是很清楚,是修饰funding 还是deciding ,现在有了点点想通,大概是at 做为状语吧,大侠再指点一下吧