交易条件修改的表达方式 — 国际贸易选择题

卖方收到买方还盘后，希望将原发盘中规定的包装由木箱改为纸箱。下列哪一句最恰当地表达了这一交易条件的修改？ A. We would like to amend the packing stipulated in our offer from wooden cases to cartons. B. We insist that the goods be packed in wooden cases as originally offered. C. The wooden cases are of no use to us and we refuse to accept them. D. Please let us know whether you can accept cartons as a gift.