付款条件的英文表达 — 国际贸易选择题
题目
某出口公司与意大利客户成交一批皮具，合同约定：买方须于提单日后30天内以不可撤销的即期信用证付款。下列英文付款条款表述正确的一项是（ ）
A. Payment shall be made by irrevocable L/C at sight within 30 days after the date of B/L.
B. Payment shall be made by revocable L/C at 30 days after sight.
C. Payment shall be made by T/T within 30 days before the date of B/L.
D. Payment shall be made by irrevocable L/C at 30 days after sight.