问题
单项选择题
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. discount rate.
B. required rate of return.
C. opportunity cost.
答案
参考答案：C
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Since Wei will be foregoing interest on the withdrawn funds, the 6% interest can be best characterized as an opportunity cost - the return he foregoes by postponing his auto purchase until the future.