CApitAl mArkEt EFFiCiEnCy is DEsirABlE, But thErE ArE limitAtions in AChiEving Full mArkEt EFFiCiEnCy. whiCh oF thE Following is lEAst likEly to BE A limitAtion in AChiEving Full CApitAl mArkEt EFFiCiEnCy
A．

A、Cost oF trADing.

B．

B、survivorship BiAs.

C．

C、limits oF ArBitrAgE.