付款条件的英文表达 — 国际贸易选择题

某出口公司与加拿大客户成交一批瑜伽垫，合同约定买方须以电汇（T/T）方式在装运后30天内付清全部货款。下列付款条款的英文表述正确的一项是（　） A. Payment shall be made by T/T within 30 days after shipment. B. Payment shall be made by L/C within 30 days after shipment. C. Payment shall be made by T/T within 30 days before shipment. D. Payment shall be made by M/T within 30 days after ordering.