It would be primarily commerce that takes place "within states" that is not a power of Congress, since the main power of Congress in this regard is to regulate interstate commerce.
I believe it is A They did not want Texas to be admitted to the union as a slave state.
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The last Tsar to rule Russia was Nicholas II before the Monarchy was abolished. He ruled from 1 November <span>1894 – 15 March 1917</span>