A．4：1
B．1：
C．2：1
D．：1
答案：C
下列命题正确的是
Which of the following statements is most likely to characterize the principal-agent problem between buyers and sellers of services（）
A. Principals can impose their own objectives on agents.
B. Principals can have complete information about agent behavior.
C. Agents cannot be completely monitored.
：1