确认订单的常用表达 — 国际贸易选择题

卖方收到买方订购500台电水壶的Order No. 623后，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 receipt of your Order No. 623 for 500 units of electric kettles and accept it on the terms stated.　B. Your order is too small, but we will take it this time.　C. Maybe we can accept your order if the price is still available.　D. Order received. We will think about it and tell you later.