单项选择题

While we may be interested in the possibilities of social harmony and individual fulfillment that may be achieved through nontraditional education, one cannot help being ------- about accepting any such program as a ------- the world's ills.

A. concerned … warning of
B. cautious … panacea for
C. fastidious … prescription for
D. reticent … renovation of
E. agitated … postscript to