"mary ann, who has schizophrenia, refuses to leave her room. she stares out the window all day, and, although she does not move for hours at a time, she sometimes compulsively rubs her arm. she rarely shows any emotional expression, and she seems unaware of the presence of others. mary ann is demonstrating"

The correct answer is catatonia.

Catatonia or catatonic schizophrenia refers to symptoms related to motor immobility or abnormality and compulsive behavior. Additionally, catatonia can involve compulsive movements such as rocking back and forth continuously or repeatedly rubbing your arm. Catatonia is a common symptom of schizophrenia.