单选题 Wei Zhang has funds on deposit with Iron Range bank. The funds are currently earning 6% interest. If he withdraws $15000 to purchase an automobile, the 6% interest rate can be best thought of as a(n) :

A、

A. discount rate.
B、

B. required rate of return.
C、

C. opportunity cost.

【正确答案】 C

【答案解析】Since Wei will be foregoing interest on the withdrawn funds, the 6% interest can be best characterized as an opportunity cost - the return he foregoes by postponing his auto purchase until the future.