The nurse is providing teaching to a client and family about schizophrenia before discharge from an inpatient facility. The nurse should instruct the family to notify the healthcare provider when which behavior is observed?

A) Fear of large dogs is common and not a behavior to worry about in clients with schizophrenia. B) Decreased attention to detail may be a symptom of schizophrenia, but it is less specific and may not warrant immediate notification. C) This can be a sign of a potential relapse or worsening of schizophrenia symptoms, which requires prompt attention from healthcare professionals. D) Changes in appetite are nonspecific and may not directly indicate an acute worsening of schizophrenia symptoms.