Based on the research by Manzardo and colleagues (2002), animals become addicted to and prefer this drug even when offered all the drugs to which they have become addicted. This drug is _____.

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The Answer of Based on the research by Manzardo and colleagues (2002), animals become addicted to and prefer this drug even when offered all the drugs to which they have become addicted. This drug is _____.

Based on the Research by Manzardo and Colleagues (2002), Animals