The Supreme Court’s ruling against Dred Scott stated that enslaved people were not citizens. Option A is correct.
On March 6, 1857, the Supreme Court ruled against Dred Scott, a slave who sued for freedom after spending time in free territory. It stated that all negroes of slave descendancy were not citizens and that the Missouri Compromise was unconstitutional. Cosequently, Northerners outraged and contributed to the start of the Civil War.