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

A．they are examples for us on our road to wealth
B．a portfolio is essential to financial success
C．they are really rich people
D．they started out on their own

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, bends and cash.
D．Everybody should realize the importance of distribution of their financial assets.