June Was Home Alone When She Heard the Sound of Breaking

June was home alone when she heard the sound of breaking glass in her back room. She walked into the room and saw a large male with a knife in his hand climbing through the window. June yelled for him to leave; however, he continued to enter the room. She grabbed her shotgun, fired one round, and killed the intruder. Does June have any defense? If so, what is it?

A) Defense of property.
B) Self-defense.
C) None: she should have retreated prior to using deadly force.
D) None: she used excessive force, since the intruder was armed only with a knife.