—How do the shops make money if they sell at such low prices?

—Manufacturers, it seems, are willing to bring down prices _______ big volume purchases.

A．under the name of

B．on behalf of

C．in return for

D．in preparation for

充分就业与物价稳定之间的矛盾体现在菲利普斯曲线所表明的这两者间的交替关系上。