Final answer:
The term for the mental disorder with positive and negative symptoms is C. Schizophrenia, a serious illness requiring lifelong management.
Step-by-step explanation:
The correct spelling for a mental disorder characterized by positive and negative symptoms is C. Schizophrenia. Schizophrenia is a severe mental illness that impairs an individual's ability to think clearly, manage emotions, make decisions, and relate to others. It commonly presents with positive symptoms such as hallucinations and delusions, as well as negative symptoms like diminished emotional expression and lack of motivation or enjoyment in daily activities. Treatment typically involves antipsychotic medications, which can mitigate symptoms but are not a cure, often requiring lifelong management of the condition.