单选题 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.

【正确答案】 C

【答案解析】Agents can and do exercise their own judgment and, because agents cannot be completely monitored, agents have opportunities to serve their own ends instead of those of the principal.