Of the Following,which Is NOT True About International Banking and Payments

Of the following,which is NOT true about international banking and payments?

A) Payment in advance is the safest method.
B) Payment in advance does not expose the importer to some risk concerning delivery of the goods.
C) A commercial letter of credit offers payment protection to both parties.
D) A commercial letter of credit is usually irrevocable.
E) An open account is a simple agreement wherein the exporter sends an invoice with the goods and the exporter pays upon the receipt.