问题如下：
Which of the following types of risk is most likely avoided by forming a diversified portfolio?
选项：
A.Total risk.
B.Systematic risk.
C.Nonsystematic risk.
解释：
C is correct.
Investors are capable of avoiding nonsystematic risk by forming a portfolio of assets that are not highly correlated with one another, thereby reducing total risk and being exposed only to systematic risk.
请问怎么样才可以避免系统性风险？
