We（）to allow you a special discount if you increase your order t

We（）to allow you a special discount if you increase your order to 5,000 pairs.
A、have prepared
B、do prepare
C、are prepared
D、to prepare
【正确答案】：C
【题目解析】：be prepared to do sth.准备干某事
句意：如果你方将订单增加到5000双，我们准备给你方一个特别折扣。