Which of the Following Statements Is FALSE

Which of the following statements is FALSE?

A) A 'futures contract' is an agreement to trade an asset on some future date, at a price that is locked in today.
B) Long-term supply contracts are unilateral contracts offered by a seller.
C) Long-term supply contracts cannot be entered into anonymously; the buyer and seller know each other's identity. This lack of anonymity may have strategic disadvantages.
D) An alternative to vertical integration or storage is a long-term supply contract.