A 40 y/o woman with insomnia, poor appetite, dizziness/nausea, and delusions of being poisoned by her husband. She experiences marked fluctuations from sadness to euphoria 5 times during the year. What diagnosis is likely?
A) Borderline Personality Disorder
B) Bipolar I Disorder
C) Schizoaffective Disorder
D) Generalized Anxiety Disorder