**Core Concept**
The negative symptoms of schizophrenia, such as apathy, social withdrawal, and poverty of speech, are a distinct clinical feature of the disorder. The pathophysiology of these symptoms is thought to involve abnormalities in dopaminergic and serotonergic neurotransmission in the prefrontal cortex.

**Why the Correct Answer is Right**
The treatment of negative symptoms of schizophrenia often involves the use of atypical antipsychotics, which have a different pharmacological profile compared to typical antipsychotics. **Aripiprazole**, a partial dopamine agonist, has been shown to be effective in treating negative symptoms by modulating the activity of dopamine D2 and D3 receptors in the prefrontal cortex. This leads to an improvement in cognitive and emotional functioning. Additionally, aripiprazole's partial agonist activity at the serotonin 5-HT1A receptor may also contribute to its efficacy in treating negative symptoms.

**Why Each Wrong Option is Incorrect**
* **Option A:** Haloperidol, a typical antipsychotic, is primarily used to treat positive symptoms of schizophrenia, such as hallucinations and delusions, and may even exacerbate negative symptoms.
* **Option B:** Olanzapine, an atypical antipsychotic, is effective in treating both positive and negative symptoms of schizophrenia, but its efficacy in negative symptoms is not as well established as aripiprazole's.
* **Option C:** Quetiapine, another atypical antipsychotic, has a more limited evidence base for the treatment of negative symptoms compared to aripiprazole.

**Clinical Pearl / High-Yield Fact**
Aripiprazole's partial agonist activity at the dopamine D2 receptor may also contribute to its lower risk of causing extrapyramidal side effects compared to typical antipsychotics.

**Correct Answer:** C. Aripiprazole.