如果想采用“量大价优”这个还盘策略，可以使用下列哪句表述?
A、Please note that the price of raw materials has risen sharply recently
B、As I have mentioned in the previous email, our price is based on different packaging method. Our final price is USD 5.2 for color box and USD 4.9 with a poly bag
C、The best we can do is to offer you a unit price of USD1.65 if you can increase the quantity up to 3,000 units
D、There is little profit margin for us