63. 下列哪一項付款條件對賣方最有利？
(A)By D/P, draft drawn on buyer payable at sight.
(B)Payment by draft payable 90 days after sight, documents against acceptance.
(C)By irrevocable L/C at 60 days after B/L DPUe.
(D)70%by sight L/C, 30% T/T before shipment 。