Officer Goldman Responds to a Call of an Active Shooter

Multiple Choice

Officer Goldman responds to a call of an active shooter during a home invasion at a local residence.Officer Goldman arrives on the scene and quickly surveys the residence.He and his partner immediately enter the home and see the suspect,who is holding a semiautomatic rifle.They command the suspect to drop his weapon and the suspect complies.Officer Goldman arrests the suspect and searches him. Which aspect of the law allowed the officer to enter the house?

A) A warrant
B) Probable cause
C) Open fields
D) Just cause