Answer:
d
Explanation: im never wrong
Dude it's the Declaration of Independence <span />
Mrs. Clark decides to do a demonstration for her class with a piece of notebook paper.Using a balance, Mrs. Clark discovers that the mass of the paper is 20 g.<span> She then takes the piece of paper and cuts it into several small pieces.</span><span> The cumulative mass of the small pieces is 20 g.</span><span> What has Mrs. Clark demonstrated for her class?</span><span>
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Truman Doctrine
In 1947, Truman pledged that the US would aid any nation in resisting the growing threat of communism to help prevent its spread.