Which One of the Following Statements Is True

Which one of the following statements is true?

A) Derivative securities are used to minimize or eliminate an investor's or a firm's exposure to various types of risk that they may be exposed to.
B) Derivatives are financial securities which are based upon or derived from existing securities.
C) Risk to an investor or a firm can be caused by interest rate changes or foreign exchange rate changes, commodity prices or stock prices.
D) all of the above