Alzheimer's disease may cause a lack of acetylcholine in some parts of the brain. The lack of acetylcholine results in cognitive impairment. One part of the treatment for early Alzheimer's patients is to use cholinesterase inhibitors. The effect of cholinesterase inhibitors in the synapse is a. inhibiting the release of dopamine from the axon terminals of the presynaptic neuron b. prevent the breaking down of the neurotransmitter acetylcholine in the synapse c. breaking down the cholinesterase enzyme in the synapse d. blocking the dopamine receptor in the postsynaptic neuron

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