Which of the following statements re: police work is most accurate?

a. Police are the least visible representatives of the legal system.

b. The three basic functions of the police are to create the law, maintain order and provide services to the community.

c. Police tend to focus on procedural guilt, whereas the criminal justice system focuses on substantive guilt.

d. Everyone who experiences police work develops at least some level of frustration due to the fact that the job is replete with paradox.