The correct answer is D) Republican Party.
The new political party that was organized during the 1850s was the Republican Party.
The Republican Party was organized in 1854 with the main goal of stopping the spread of slavery into Western territories. Due to the Dred Scott decision, many people joined the Republican Party. The Republican party was formed to oppose the Nebraska-Kansas Act that put and endo to the Missouri Compromise. Since its conception, the Republican Party promotes values such as free trade, corporations freedom, and political and economic conservatism.