The second one man. I believe that's the answere
North: Had a larger population, had a great industrial advantage, the north controlled the seas, the North had more troops to fight the war. the North had railroads, steamboats, roads, and canals for faster transport of supplies and troops.
South: The south was playing defense on their own territory, the South had better Generals who knew better how to fight, and the South could produce all the food it needed.
The correct answer is: "He developed mathematical principles"
René Descartes (1596 – 1650) was a French philosopher, mathematician, and scientist who lived more than 20 years in the Dutch Republic and was one of the main figures of the Dutch Golden Age.
His great influence in mathematics has been his major contribution to the Scientific Revolution, although his work in philosophy is outstanding too. He developed the the Cartesian system of coordinates. He is considered the father of analytical geometry, which connects both algebra and geometry and which has been used in the development of infinitesimal analysis and calculus .
The correct answer should be A
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