what is an output contract? group of answer choices a contract in which a buyer agrees to purchase all of his required goods from one seller a contract between a manufacturer and a distributor where the distributor only buys from the manufacturer and is contractually prevented from trading with the manufacturer's competitors a contract in which the seller guarantees to sell all of its output to one buyer, and the buyer agrees to accept the entire quantity a contract in which a seller agrees to sell a product or service to the buyer only on the condition that the buyer also purchases an additional product from the seller