Which of the Following Is an Example of a Paradigm

Which of the following is an example of a paradigm shift in policing?

A) The spoils system during the political era was replaced by a more professional structure.
B) The long-gone method of foot patrols was brought back to help improve community relations.
C) Politics, once divorced from policing, was once again considered a cornerstone of policing.
D) Community policing methods were challenged and then discredited by those who advocated for the older and more traditional methods.