After Not Seeing Rita for Almost a Week, a Neighbor

After not seeing Rita for almost a week, a neighbor went to check on her. He discovered that Rita had barricaded all the doors and windows in her apartment because she believed that "terrorist forces" were going to attack her and her three cats. Rita appears to be suffering from:

A) visual hallucinations.
B) delusions of persecution.
C) delusions of reference.
D) avolition.