Police and Other Law Enforcement Agents Are Termed the Gatekeepers

Police and other law enforcement agents are termed the gatekeepers of society because:

A) Gatekeepers was a historic term associated with the London Metropolitan Police.
B) Police initiate contact with law violators.
C) Police provide security in American society.
D) Gatekeeping involves opening and closing a flow; thus, police discretion controls the gates of the justice system.