Answer (C) is correct. A problem in an international sale is whether the seller will be paid. The problem is solved by using a letter of credit and a bill of lading. A bill of lading is a document of title evidencing receipt of goods by the carrier for shipment. A bill of lading is not an agreement with a bank to pay drafts or other demands for its customer. Such an agreement is a letter of credit (UCC 5-103). A seller is paid when (s)he presents the bill of lading to the buyer’s bank.