A．It is too high for such a light weight.
B．It is difficult to judge the value of such an object.
C．It is a small amount to pay for so much precious metal.
D．It is reasonable for an object with such an important function.

A．They know what they want to buy.
B．They have little money to spend.
C．They talk themselves out of purchase.
D．They shop at the cheapest stores.