Four Historical Eras Helped Shape the Role of the Police

Four historical eras helped shape the role of the police in the United States. These were:

A) The Political Era, The Professional Era, and The Community Problem-Solving Era, The Homeland Security Era
B) The Early Era, The Civic Era, and The Public Era, The Post-911 Era
C) The First Era, The Second Era, and The Third Era, The Fourth Era
D) The Government Era, The Occupational Era, The Societal Era, The Scholarly Era