Answer:
D
Explanation:
If these three substances are mixed together with the required proportion, it would yield concrete all the time. Thus, the result is replicable, or repeatable, in future experiments.
The result is not from an observation of the natural world because the three substances were mixed together by man in a lab.
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Answer:
"The Articles of Confederation introduced thirteen different articles that granted powers to the states and to the federal government. ... Each state retains its sovereignty, freedom, and independence, and every power, jurisdiction, and right, which is not by this Confederation expressly delegated."
Explanation:
