Which of the Following Best Describes a Barter Agreement

Which of the following best describes a barter agreement?

A) It is an agreement between the exporter and importer to trade goods and services in exchange for other goods and services.
B) It is an agreement where the issuer makes an unconditional promise in writing to pay a certain amount of money, at a certain time or on demand of the payee.
C) It is an agreement which permits the sale of securities and also permits the seller to buy back the securities.
D) It is a document issued by a carrier to another party which provides details about the shipment of merchandise.
E) It is an agreement for the hiring of a vessel that excludes the technical or maintenance aspects of the vessel.