41 對出口商而言，下列付款方式安全性由大至小的排序為何？
① 70% Usance L/C + 30% D/A ② 100% Sight L/C
③ 70% Sight L/C + 30% D/P ④ 30% CWO + 70% Sight L/C
⑤ 100% O/A
(A)④②③⑤①
(B)④②③①⑤
(C)②④③①⑤
(D)④②①③⑤

④ 30% CWO + 70% Sigh...