**Core Concept**
Buspirone is a non-benzodiazepine anxiolytic that primarily acts on the central nervous system to produce its therapeutic effects. It is a serotonin 5-HT1A receptor partial agonist, which distinguishes it from other anxiolytics that may act on GABA receptors.

**Why the Correct Answer is Right**
Buspirone's mechanism of action involves the activation of serotonin 5-HT1A receptors in the prefrontal cortex, hippocampus, and other brain regions. This action is thought to lead to anxiolytic effects by reducing the firing rate of neurons in these areas. The partial agonist activity of buspirone at 5-HT1A receptors also helps to regulate the activity of other neurotransmitter systems, including dopamine and glutamate.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because buspirone is not a GABA receptor agonist like benzodiazepines. While GABA receptor activation is associated with anxiolytic effects, buspirone's unique mechanism of action at serotonin 5-HT1A receptors is distinct from this class of drugs.
**Option B:** This option is incorrect because while serotonin is involved in buspirone's mechanism of action, the specific receptor subtype targeted is the 5-HT1A receptor, not the 5-HT2 receptor.
**Option C:** This option is incorrect because buspirone is not a monoamine oxidase inhibitor (MAOI). MAOIs are a different class of antidepressant medications that work by inhibiting the enzyme monoamine oxidase.

**Clinical Pearl / High-Yield Fact**
Buspirone is unique among anxiolytics in that it has a relatively slow onset of action, typically requiring several weeks to achieve maximum therapeutic effects. This is in contrast to benzodiazepines, which can produce rapid anxiolytic effects but are often associated with dependence and withdrawal symptoms.

**Correct Answer: C.