Question

the dred scott v. sanford ruling was a trigger for which event? world war i war of 1812 the civil war

Explanation:

The 1857 Dred Scott v. Sanford ruling declared enslaved people were not U.S. citizens and Congress could not restrict slavery in territories. This deepened sectional tensions between pro-slavery and anti-slavery states, acting as a key trigger for the U.S. Civil War (1861-1865). The War of 1812 and World War I occurred unrelated to this ruling.

Answer:

the Civil War