When asked about their opinions about the schoolmaster, many teachers would prefer to see him step

aside________younger men. [ ]

A. in terms of  

B. in need of

C. in favor of  

D. in praise of

日本经营学家认为在现代市场中，永远存在市场的盲点。由此提出了（）。

A.经济进化论

B.不完全市场理论

C.市场缝隙理论

D.规模经济理论