The initiation of a futures position: A. requires both a buyer and a seller. B. is done through a bank or other large financial institution acting as a dealer. C. is at a price negotiated between the buyer and seller.
Futures trades are done through open outcry on the futures exchange and require a buyer (long) and a seller (short) for a trade to take place. The other statements are generally true for forward contracts, which are all individually negotiated.