When Can a Police Officer Arrest an Individual Without a Warrant

When can a police officer arrest an individual without a warrant?

A) if an officer thinks an individual has committed a summary conviction offence
B) if an officer cannot verify that there is an outstanding warrant for the arrest of an individual
C) if an officer discovers someone in the process of committing any criminal offence
D) if there is an order from an official from the office of the Minster of Justice