【单选题】在D/P at sight 、D/P after sight和D/A三种支付方式下，就卖方风险而言，哪个正确(        )。
选项：

A:D/A﹤D/P at sight﹤D/P after sight
B:D/P after sight﹤D/A﹤D/P at sight
C:D/P at sight﹤D/P after sight﹤D/A
D:D/P after sight﹤D/P at sight﹤D/A