If the exporter and the importer do not know each other well and are located in countries thousands of miles apart, which of the following terms of payment is both safe and benefit to cash flow?
A. by D/P at sight
B. by 30%T/T in advance, 70% D/P
C. by an irrevocable L/C at sight
D. by 30% T/T in advance, 70% irrevocable L/C at sight