Applying the Court's Holding in Atwater V

Applying the Court's holding in Atwater v. City of Lago Vista, which of the following describes when a police officer can make a warrantless arrest in public of a person who has committed a misdemeanor?

A) When there isn't sufficient time to obtain a warrant
B) When an informant tip provides sufficient probable cause for the officer to make the arrest
C) When the offender commits the misdemeanor in the officer's presence
D) Never