What is the Rub' al Khali? A. a desert in the southern Arabian Peninsula
B. a forest in the southwestern Arabian Peninsula
C. a river in the northern Arabian Peninsula
D. an area of fertile land in the central Arabian Peninsula

Which concept is plato expressing in the excerpt below? when men have both done and suffered tyranny, and have had experience of both . . they think that they had better agree among themselves to have neither. . —plato, the republic: book ii