Questions 17 to 20 are based on the following telephone interview. You now have 15 seconds to read Questions 17 to 20.

What does Dr. Smith probably think about the cost of the new weight

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