A blog post from a few years ago discusses how to treat a sprain. A scholarly paper published last month discusses a slightly different approach. Which quality makes the scholarly paper a more reliable source of health information?

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delegated (sometimes called enumerated or expressed) powers are specifically granted to the federal government in article i, section 8 of the constitution. this includes the power to coin money, to regulate commerce, to declare war, to raise and maintain armed forces, and to establish a post office.