Abigail has noticed that Rose, her roommate, experiences extreme shifts in her moods and behavior. Of late, Abigail noticed that Rose is unusually energetic and optimistic even though she hasn't been sleeping much. She is also highly distractible and delusional. This period of euphoria has lasted more than a week and is in sharp contrast to the depression and fatigue Rose exhibited in the previous semester. Rose is most likely to be diagnosed with.

A)bipolar disorder.
B)hypomania.
C)attention-deficit/hyperactivity disorder.
D)persistent depressive disorder.

A)bipolar disorder.

Explanation:

Bipolar disorder  is a mental disorder that is characterized with extreme moods resulting to high periods associated with  mania and low periods associated with  depression that causes an individual  to experience  unusual shifts in mood, energy, activity levels,fatigue and the inability tocarry out daily tasks.

Abigail's room mate, Rose is  unusually energetic and optimistic even though she hasn't been sleeping much and highly distractible and delusionaland shows dign of depression the following week  shows Rose is most likely to be diagnosed with__BIPOLAR DISORDER___ because she is exhibiting  two extreme moods of mania and depression.