Read the excerpt from the Constitution of the United States, Article 1, Section 8.
[Congress shall have power] to regulate Commerce with foreign Nations, and among the several States.
This excerpt reinforces the idea of
federal supremacy.
implied powers.
balance of powers.
judicial review.
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A. federal supremacy

Explanation:

The term supremacy legally means highest authority. And Congress of the USA is the legislature of the federal government.

So this basically means that the Constitution gives the Congress ( the federal government) greter authority, the power to overrule State laws and actions, such is the case here, concerning Commerce.

Unlike this, implied powers denote powers that aren't explicitly given to Congress through the Constitution, but rather indirectly result from them.

a) which ethnic groups live in this community?

i just took test

hygrometers and hair thermometers (often found as part of hygrometers/psychrometers) can be used to measure humidity. barometers are used to measure atmospheric pressure, while anemometers are used to measure wind speed. so the 2nd and 4th choices should be the correct answers.