It means that the government is split into two (central and local). The local government (state) helps the central (federal) government make decisions and they govern different parts of the country.
The correct answer is: [C]: "more common" .
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"Drug abuse is <u> more common </u><u /> among college students than among their contemporaries who are not in college."
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Yes, that's true. North American Free Trade Agreement is what it stands for.
