求教~

prefer  to 和 prefer over 有什么实质性的区别啊... 

我错了  题目忘记打了~  大全462

462.        Judge Lois Forer’s study asks why do some litigants have a preferred status over others in the use of a public resource, the courts, which in theory are available to all but in fact are unequally distributed among rich and poor.

(A) do some litigants have a preferred status over others in the use of a public resource, the courts, which in theory are available to all but in fact are unequally distributed among

(B) some litigants have a preferred status over others in the use of a public resource, the courts, which in theory are available to all but in fact are unequally distributed between

(C) do some litigants have a preferred status over another in the use of a public resource, the courts, in theory available to all but in fact are unequally distributed among

(D) some litigants have a preferred status to another in the use of a public resource, the courts, in theory available to all but in fact not equally distributed between（B）

(E) does one litigant have a preferred status over the other in the use of a public resource, the courts, in theory available to all but in fact they are not equally distributed among

答案没有疑义  但是over 和to 怎么区分呢

首先why后面要跟陈述句语序，排除ACE，B中不是prefer over的固定搭配，over只是一个单独的介词