Amphetamine dexamphetamine lisdexamfetamine methylphenidate

What is the primary function of vesicular monoamine transporter 2 (VMAT2) in neurotransmission and how do amphetamines interact with this transporter?

1: VMAT2 facilitates the transport of monoamines into presynaptic neuron vesicles, and amphetamines enhance this process.
2: VMAT2 facilitates the transport of glutamate into neurons, and amphetamines inhibit this process.
3: VMAT2 facilitates the transport of monoamines into presynaptic neuron vesicles, and amphetamines inhibit this process.
4: VMAT2 facilitates the reuptake of serotonin into neurons, and amphetamines inhibit this process.