Which of the Following Is Not a Property or Benefit

Which of the following is not a property or benefit of credit derivatives?

A) In instruments subject to multiple sources of risk (such as junk bonds) ,they enable separating out credit risk from other risks.
B) They enable hedging out credit risk of securities that are illiquid and hard to sell.
C) They reduce the overall level of default risk in the economy.
D) They offer reference prices that make it easier to price other securities that have credit risk.