The correct answer is C. Both acknowledged the right of territories to choose how to enter the Union.
Explanation:
The Compromise of 1850 was a set of bills that had the purpose to end with the confrontation between different states that had acquired territories during the Mexican-American War, which was a territory conflict between 1846 and 1848. In this way, the Compromise of 1850 regulated the conditions of rights for the new territories to be part of the Union or the rest of the U.S. states, this included establishing the boundaries in New Mexico and letting some territories decide democratically if they agreed with slavery or not. On the other hand, the Kansas-Nebraska Act was an act passed on 1854 with the purpose of creating the territories of Kansas and Nebraska and allow the territories to decide democratically on slavery before entering the Union again, which means this act also recognized the right of the territories to decide how to enter the Union especially in terms of slavery. Considering this, it can be concluded a key similarity between the Compromise of 1850 and the Kansas-Nebraska was that "both acknowledged the right of territories to choose how to enter the Union".
