Which of the following laws is described by this list? Pacific Railway Act Missouri Compromise Compromise of 1850 - Popular sovereignty applied to rest of the Mexican Cession Kansas-Nebraska Act Clear my selection

The laws you listed are primarily associated with the issue of slavery and its expansion in the United States during the 19th century. They are significant in the context of the sectional tensions between the North and South leading up to the Civil War. 1. **Pacific Railway Act** - This act facilitated the construction of the First Transcontinental Railroad in the United States, which was significant for westward expansion but also tied to issues of land and settlement that involved slavery. 2. **Missouri Compromise (1820)** - This was an early attempt to manage the balance of slave and free states by admitting Missouri as a slave state and Maine as a free state, and it established a line (36°30′) north of which slavery was prohibited. 3. **Compromise of 1850** - This series of laws aimed to resolve disputes over slavery in territories acquired from the Mexican-American War. It included provisions such as admitting California as a free state and implementing popular sovereignty in the rest of the Mexican Cession. 4. **Kansas-Nebraska Act (1854)** - This act created the territories of Kansas and Nebraska and allowed the settlers in those territories to determine through popular sovereignty whether they would allow slavery, effectively repealing the Missouri Compromise. Overall, these laws are part of the broader context of **Compromises over Slavery** in the United States, which sought to address the contentious issue of slavery's expansion into new territories and states. They reflect the growing sectional conflict that ultimately led to the Civil War.