确认订单的常用表达 — 国际贸易选择题

卖方收到买方订购600件羊毛围巾的Order No. 834，拟复函确认接受该订单。以下四个句子中，属于确认订单的规范常用表达、语气礼貌且信息完整无歧义的是哪一项？ A. We confirm our acceptance of your Order No. 834 for 600 woolen scarves and will arrange shipment as scheduled. B. We have received your letter. C. Your order is maybe fine with us. D. Send us the money first before we do anything about Order No. 834.