The nurse is interviewing a client with schizophrenia. Which client behavior requires immediate intervention?

A. Shuffling gait and stooped posture are common side effects of antipsychotic medications and may require intervention but are not immediately dangerous.B. Rocking back and forth in the chair can be a self-soothing behavior in individuals with schizophrenia and usually does not require immediate intervention.C. Muscle spasms of the back and neck (dystonia) can be a sign of a serious side effect of antipsychotic medications known as extrapyramidal symptoms and require immediate intervention to prevent complications such as airway obstruction.D. Lip smacking and frequent eye blinking can indicate tardive dyskinesia, a long-term side effect of antipsychotic medication, but it is not an immediate emergency.