The speech by the mayor of Shanghai before the final voting for EXPO 2010 is strongly impressed _____

my memory. [ ]

A. to

B. over

C. by

D. on

与资金量小、信息不足、缺乏技巧的个人投资者相比，机构投资者具有资金与人才实力雄厚、投资理念成熟、抗风险能力强等特征，因而其成熟程度被视为评价市场稳定性的重要指标之一。( )