看了《钢铁是怎样炼成的》后，有人出了一副对子。上联是“身残志坚，保尔高唱生命曲”，请你结合《西游记》或《水浒》中的有关情节写出下联。

下联：                                                        (2分)

All of the following are benefits of derivatives markets EXCEPT:()

A. transactions costs are usually smaller in derivatives markets, than for similar trades in the underlying asset. 

B. derivatives markets help keep interest rates down and supply valuable price information. 

C. derivatives allow the shifting of risk to those who can most efficiently bear it.