The answer is definitely A.
In the War of 1812, caused by British restrictions on U.S. trade and America’s desire to expand its territory, the United States took on the greatest naval power in the world, Great Britain.
The North had its share of problems during the U.S Civil War. Late in the war, when victories are few and casualties are high, the Union employed conscription to alleviate manpower shortages. Of course, conscription did not proceed well and it did not sit well with the general public. There is so much evasion and resistance to the draft, leading to violent draft riots in New York.
Answer:
William Crawford Gorgas, (born Oct. 3, 1854, Mobile, Ala., U.S.—died July 3, 1920, London, Eng.), U.S. Army surgeon who contributed greatly to the building of the Panama Canal by introducing mosquito control to prevent yellow fever and malaria.
Explanation: