Which One of the Following Statements Is True

Which one of the following statements is true?

A) Investors should put all of their "eggs in one basket."
B) Individuals can ignore their tolerance for risk when selecting specific investments.
C) Diversification is one way to lessen systematic risk.
D) The amount of time a specific investment has to work is an important consideration when developing an investment portfolio.
E) Younger investors should invest a large percentage of their portfolio in income-producing securities.