As a result of the supreme court ruling in the dred scott case, slaveholders has the legal right to take persons into- a. missouri b. any territory c. kansas and nebraska d. western territories

B. The Dred Scott case ruled that slaves were property and a property owner could do whatever he wished with his property, including taking the slave to areas in which slavery was prohibited, therefore allowing slaves to be taken into any territory. 

It covered the territory of land across eurasia from northeastern europe to the pacific ocean.

I'm pretty sure that's called a volcano