The monoamine hypothesis of depression proposes that

Question

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The monoamine hypothesis of depression suggests that depression is caused by insufficient activity at monoamine synapses in the brain, particularly those involving serotonin, norepinephrine, and dopamine. Therefore, choice A is the best option, as it suggests that depression is a result of too little stimulation at monoamine synapses. Choices B, C, and D are incorrect because they suggest too much, absent or over-produced monoamine, which are not consistent with the monoamine hypothesis.

The Monoamine Hypothesis of Depression Proposes That