Which major economic developments intensified Southern states' political power and economic influence over the U.S. government prior to the Civil War? The land acquisition from the Louisiana Purchase Links to an external site.in 1803 greatly expanded the territory available for plantation agriculture. Eli Whitney's "invention" of the cotton gin Links to an external site. in 1793 greatly reduced the time and labor required to pick a pound of cotton. The emergence of the cotton textile industry Links to an external sitein England created a demand for U.S.-produced cotton. A&B All of the above 40 Acres and a Mule was a form of Land redistribution Reparations Charity A&B All of the above Which major economic developments intensified Southern states' political power and economic influence over the U.S. government prior to the Civil War? The land acquisition from the Louisiana Purchase Links to an external site.in 1803 greatly expanded the territory available for plantation agriculture. Eli Whitney's "invention" of the cotton gin Links to an external site. in 1793 greatly reduced the time and labor required to pick a pound of cotton. The emergence of the cotton textile industry Links to an external sitein England created a demand for U.S.-produced cotton. A&B All of the above What major changes in rights did the Fourteenth Amendment add to the in the U.S. Constitution? It challenged the Dred Scott decision by all persons born or naturalized in the U.S. citizens. It eliminated the 3/5 s clause by only "counting the whole number of persons in each State." it limited the power of states to "abridge" or deny the civil rights of individuals. A&C All of the above According to the Freedmen's Bureau Act of March 1865, what types of support were newly emancipated people of African descent to receive? Assistance with getting food, clothing, and basic needs met Assistance with making their marriages legal Assistance with opening their own businesses. A&B All of the above