Answer: d. Patrol units
Step-by-step explanation:
The department in the police force responsible for keeping order and maintenance of law are known as Patrol Officers. They maintain order and protect a community by enforcing the laid down laws. They patrol an assigned area given to them by their superiors to help prevent illegal activity and assure the safety of citizens livi within the community. Sometimes they act as traffic warden by directing traffic, write tickets, investigate an accidents , a crimes and respond to calls for help from citizens.