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装运条款由「允许分批装运」改为「不允许分批装运」。下列哪一句最恰当地表达了这一交易条件的修改？ A. We regret being unable to accept your request, as partial shipment is strictly prohibited. B. Please amend the shipment terms to read: partial shipment not allowed. C. Partial shipment will be made during May and June as usual. D. We thank you for your counter-offer and confirm partial shipment is acceptable.