The word "returns" in paragraph three can be best replaced by "______".

A．Everybody can get rich with some financial assets.
B．The credit risk for treasury bonds is extremely high.
C．It's no use trying to know the advantages of stocks, bonds and cash.
D．Everybody should realize the importance of distribution of their financial assets.

A．how to avoid inflation risks
B．what kinds of bonds to buy
C．how to get rich by investing in stock market
D．how to become richer by spreading the risk