John Broderick is classified as Vigilante officer.
Option D
Explanation:
A committed officer whose main priority is to protect people from any untoward incidents is construed to be a vigilante officer. Vigilante is nothing but always watching the people who are trouble mongers and keeping an eye on their movement to protect others from get harmed by this trouble mongers.
John Broderick is also a committed vigilante officer who will watch around the neighbourhood and ensure that the place free from any crime and protect the people from any eventualities.