问题
单项选择题
Jasmir Singh, CFA, is a famous economist and does research about capital market. Which of the following factors most likely affects the demand for capital and not supply of capital（）
A. Marginal revenue product of capital.
B. Income.
C. Interest rates.
答案
参考答案：A
解析：
资本的供给和需求由利率决定，资本的边际收入产品(marginal revenue product of capital)仅影响资本的需求而不影响资本的供给。