A Futures Contract Can Be Defined As

A futures contract can be defined as:

A) a contract which provides something to be sold at a future date at a price decided today.
B) a contract which provides something to be sold at a future date at a price decided upon expiry of the contract.
C) a right given to a buyer to sell something at a price determined in advance.
D) a contract that expires when the object of the transaction changes hands.