Loans by an Exporter's Bank Based on the Security of a Documentary

Loans by an exporter's bank based on the security of a documentary draft

A) are supported entirely by the strength of the importer.
B) are subject to the approval of the importer's bank.
C) are available only to exporters with strong credit ratings.
D) have not only the financial strength of the exporter to support them, but also that of the importer.