Which policy was a last-ditch effort by the us congress to preserve the union and stave off secession? wilmot proviso missouri compromise compromise of 1850 manifest destiny?

The answer is the Compromise of 1850. This compromise wanted to stop the secession conflicts that were happening in the US. The said law was able to diffuse the on-going conflicts with regards to the lands acquired from the Mexican-American War. It was able to stop some issues of the ongoing crisis but citizens have different opinions with regards of this law