Which of the Following Did the Union Congress Accomplish During

Which of the following did the Union Congress accomplish during the Civil War?

A) a comprehensive ban on foreign immigration, especially from Ireland and other countries that tended to fight for the Confederacy
B) a law that required western settlers to move back East to support the war effort by working in factories
C) the approval of the transcontinental railroad and the raising of tariff rates to encourage economic development
D) a major decrease in income taxes to cut down on the widespread poverty of wartime and bolster individual families
E) a refusal to support general "agriculture and mechanic arts" in favor of focusing strictly on revamping the cotton industry in the North