Schizophrenia is characterized by ___________.

A) an inability to be alone
B) negative symptoms such as flat, emotionless voices but not by positive symptoms
C) disturbances in thought and language, perception and attention, motor activity, and mood
D) positive symptoms but not negative symptoms

Schizophrenia is characterized by disturbances in thought and language (such as delusions and disorganized speech), perception and attention (such as hallucinations), motor activity (such as catatonia), and mood (such as difficulty experiencing pleasure). It can also include positive symptoms (such as hallucinations and delusions) and negative symptoms (such as flat affect and apathy). Schizophrenia does not necessarily involve an inability to be alone, which is a social anxiety/specific phobia symptom.