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_____ play(s) a critical role as a neurotransmitter that stimulates muscles to contract

A) Acetylcholine B) GABA C) Dopamine D) Endorphins

Chris was getting more and more frustrated as he looked for his wallet. He simply could not remember what he had done with it, and he felt like he'd checked everywhere for it. As he sat on his sofa trying to come up with a solution,

it suddenly dawned on him in a glorious "Aha" moment that he'd left the wallet in his car. This kind of solution – where an answer suddenly comes to a person – is called __________. a. a savant moment b. inspiration c. insight d. prototyping