Community Policing Has Had Which of the Following Effects

Community policing has had which of the following effects?

A) officers' increased job satisfaction, higher morale, and improved relationships with citizens and coworkers
B) a major decrease in crime rates in each city where community policing was implemented
C) a major increase in crime rates in each city where community policing was implemented.
D) no effect on officers job satisfaction, but an improvement in veteran officers' decision making in the field.