Which of the following statements is most compatible with the principles embodied in Plessy v. Ferguson as described in the passage? A. Internal separation of whites and blacks within a given school is unconstitutional. B. Whites and blacks may be educated in separate schools so long as they offer comparable facilities. C. The maintenance of separate professional schools for blacks and whites is unconstitutional. D. The separate-but-equal doctrine is inapplicable to the realm of private education. E. Blacks may be educated in schools with whites whenever the blacks and whites have equal institutions.