C. Is the answer to your question
Answer:
<em>Carnegie worked with others in establishing a steel rolling mill, and steel production and control of industry became the source of his fortune. Carnegie had some investments in the iron industry before the war. When he built his first steel plant, he made a point of naming it after Thomson.</em>
Explanation:
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Martin v. Hunter's Lessee was a landmark Supreme Court decision that ruled that the court has the right to hear all appeals of state court decisions involving federal statutes and treaties. This early landmark case established the primacy of the Supreme Court over the state courts, effectively disproving a dual sovereignty judicial system between the federal and state governments.