Which of the Following Statements Is Most Correct

Which of the following statements is most correct?

A) The benefits of international specialization of effort are so great that a nation should pursue such a policy irrespective of the policies of other nations.
B) Arbitrage in the international exchange market has the unfortunate effect of creating instability in exchange rates.
C) The trust receipt is used by a bank in releasing shipping documents to a customer when the bank wishes to retain title to the merchandise.
D) The bankers' acceptance and the commercial letter of credit involve three principal parties: the importer,the importer's bank,and the exporter.