付款条件的英文表达 — 国际贸易选择题
题目
某出口公司与西班牙客户成交一批灯具，合同约定：买方须在提单日后30天以不可撤销的远期信用证付款。下列付款条款的英文表述正确的一项是（ ）
A. Payment shall be made by irrevocable L/C at 30 days after the B/L date.
B. Payment shall be made by revocable L/C at 30 days sight after B/L date.
C. Payment shall be made by irrevocable L/C at sight within 30 days after B/L date.
D. Payment shall be made by irrevocable T/T at 30 days after the B/L date.