Which of the Following Statements Is Incorrect Regarding Organized Futures

Which of the following statements is incorrect regarding organized futures exchanges?

A) Organized exchanges establish and enforce rules for the trading of financial futures contracts.
B) Organized exchanges serve as market makers for futures contracts by taking positions in futures.
C) Organized exchanges clear, settle, and guarantee all transactions that occur on their exchanges.
D) The operations of financial futures exchanges are regulated by the Commodity Futures Trading Commission (CFTC) .
E) All of the above are correct.