问题详情

Whydoestheexporterusuallyinsistonthebuyerestablishingacreditinhisfavorbeforeshipmentisunloaded？
A．Tocollecttheproceeds.
B．Todrawdrafts.
C．Torevokethecontract.
D．Toreducethepossiblerisk.

请帮忙给出正确答案和分析，谢谢！