Answer:
The correct answer is 3. The Political Era of law enforcement history is so called because law enforcement was organized by individual politicians.
Step-by-step explanation:
The Political Era of law enforcement was characterized by a period in which police officers were assigned their positions by the will of incumbent politicians, so that the police was absolutely controlled by the politicians. This period, which lasted from the 1840s to the 1930s, was characterized by having a highly corrupt police, which favored the interests of the incumbent politicians, harming minorities and political opponents.