问题详情

Whichofthefollowingpaymenttermseliminatestheexchangerisk,assumingtheexporterinvoicesinforeigncurrency？______.
A．Confirmedirrevocabledocumentarycredit
B．Openaccount
C．DocumentarycollectionD/A
D．Noneoftheabove

请帮忙给出正确答案和分析，谢谢！