Final answer:
The most secure/reliable export financing payment methods, arranged in descending order, are documentary collection, documentary credit (L/C), cash in advance, and sales on open account. The correct option is c.
Step-by-step explanation:
The correct arrangement of export financing payment methods in descending order from most secure/reliable to least secure/reliable is option C) documentary collection (draft)→documentary credit (L/C)→cash in advance→sales on open account.
Documentary collection is a method where the exporter entrusts the handling of payment and documents to the bank, providing more security than sales on open account. Documentary credit (L/C) involves the bank offering a guarantee of payment to the exporter based on certain conditions. Cash in advance ensures full payment from the importer before shipment takes place, providing high security. Sales on open account is the least secure method as it involves the exporter extending credit to the importer.
Therefore, the correct answer is option C) documentary collection (draft)→documentary credit (L/C)→cash in advance→sales on open account.