Which One of the Following Statements Correctly Describes a Credit

Which one of the following statements correctly describes a credit instrument?

A) All credit sales of a commercial nature are accompanied by a promissory note.
B) A time draft requires payment at the time the goods are delivered.
C) A commercial draft is signed once the goods are received in good shape by the buyer.
D) A banker's acceptance is a sight draft for which payment has been guaranteed in the future by a bank.
E) Under a conditional sales contract, the seller retains legal possession of the good sold until the sales invoice has been paid in full.