447. Ryan's ______ bothered his friends, who tired of his instability and constant changes of allegiance.
A. blundering
B. exuberance
C. fickleness
D. naivete
E. cocksureness

448. Hypatia of Alexandria, a noted mathematician in Roman Egypt who also taught philosophy and astronomy, championed ______ , deliberately ______ the mystical thinking and occult practices prevalent during her times.
A. empiricism, appropriating
B. rationalism, eschewing
C. stoicism, bolstering
D. spiritualism, subverting
E. intellectualism, inculcating

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