The word "prevalent"(Sentence 1, Para. 1)in this passage means

A．The intellectual development of American schools.
B．The independence of American schools from Europe.
C．The central control of American schools.
D．The role of local authority in American schools.

A．that American schools were colonial and therefore were under European control
B．that American schools desired to be expressive
C．that American schools emphasized the need of intellectual freedom
D．that American schools were for common citizens while European schools were for nobles