<span>Both documents concerned the rights of states to hold that a federal act was unconstitutional and to refuse to apply it. Calhoun's doctrine concerned the Tariff of Abominations and how SC would secede if it was not repealed. The Kentucky and Virginia Resolves concerned the Alien and Sedition Acts.</span>
Your answer is stockholders, modern machinery, consolidation, specialists, and stifling competition, because the antitrust laws were put in place to destroy mammoth enterprises.
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Things such as electricity, petroleum and steel. The revolution was possible due to the availability of natural resources (petroleum), strong government, transportation methods, power supplies, and a high amount of laborers.
Specific people involved are Andrew Carnegie who dominated the steel industry and owned J.P Morgan; Alexander Bell who created the telegraph. There's also John D. Rockefeller who greatly influenced the oil industry and Cornelius Vanderbilt who use railroads to connect major cities.
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The correct option is option C which tells that using the same currency under Confederation laws not guaranteed.
Explanation- Before the constitution was made there was a loss set of rules that were laid to run the country. These laws allowed the 13 states to work as individual states and there was no one law that could be followed in all the 13 States.
Even with the currency every state had their own set of currencies and the values of these currencies were also different in different states hence we can say under Confederation law same currency was not guaranteed.