Concept:An indent is an instruction from an importer to an agent to purchase goods. A closed indent names the specific firm from which the goods must be bought.Explanation:A closed indent directs the agent to buy goods from a particular, named firm.An open indent allows the agent to select any suitable supplier.A proforma invoice and a consular invoice are trade documents, not instructions to an agent.Hence, the correct option is the closed indent.Answer:D. closed indent