The compromise passed by Congress that allowed former Mexican territories to decide the issue of slavery for themselves was:
A. the Compromise of 1850
The Compromise of 1850 was a series of laws that aimed to settle disputes between free states and slave states regarding the expansion of slavery into newly acquired territories. One of the key components of this compromise was the idea of popular sovereignty, which allowed the residents of each territory to decide through voting whether they would allow slavery or not. This was particularly relevant to the territories acquired from Mexico after the Mexican-American War.
By implementing popular sovereignty, the Compromise of 1850 provided a temporary solution to the issue of slavery in the newly acquired territories by allowing them to determine their stance on slavery independently. This approach was seen as a way to diffuse tensions between the North and the South over the expansion of slavery.
