【单选题】

Educators who study the influences of geographical differences on educational success have concluded that environment is not______factor, as students in one country are no more______than those in another.
A．(A) an essential … erudite

B．(B) a determining … preeminent
C．(C) a pernicious … mediocre
D．(D) a conducive … meritorious
E．(E) a wholesome … susceptible