—I’m very sorry, Allen. I can't find your favorite CD.

— _____, Torn. I'll go and buy another one.

A. It doesn't matter            B. Don't say that

C. Sure                         D.  You are kidding.

甲、乙两位老板分别以同样的价格购进一种时装，乙购进的套数比甲多，然后甲、乙分别按获得80%和50%的利润定价出售，两人都全部售完后，甲比乙多获得一部分利润，这部分利润又恰好够他再购进这种时装10套，甲原来购进这种时装多少套（）

A．40

B．50

C．60

D．55