【单选题】

It is clear that many institutional investors once voted -------; now after so many scandals, some managers admit that they should have done more to ------- corporate excesses.
A．(A) imprudently... curb

B．(B) insolently ... insinuate
C．(C) intelligently... observe
D．(D) precariously ... expose
E．(E) insensitively ... brook