Which of the following best describes the relationship of the final paragraph to the passa

ge as a whole？

A．The central idea is reinforced by the citation of evidence drawn from twentieth-century history.

B．The central idea is restated in such a way as to form. a transition to a new topic for discussion.

C．The central idea is restated and juxtaposed with evidence that might appear to contradic it.

D．A partial exception to the generalizations of the central idea is dismissed as unimportant.

E．Recent history is cited to suggest that the central idea’s validity is gradually diminishing.