251. The Classical Age of Greece, 500 B.C. to 323 B.C., was characterized by contradictions: it was a mix of superstition and ______ , of ______ concepts and centuries-old traditions.
A. intuition, radical
B. rationality, revolutionary
C. reason, reputable
D. revelation, established
E. conjecture, progressive

252. Celia Tomlinson personifies ______ : she overcame poverty, language barriers, and discrimination to found, own, and operate her own engineering company.
A. tenacity
B. nonchalance
C. circumspection
D. expediency
E. munificence

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