<span>When South Carolina seceded
from the Union in 1860, the main justification of secession was that
southerners believed secession was the only way they could preserve
their institution of slavery. Not all southerners supported
secession, however, but those who did argued that because the southern
states were a part of the Union, their rights should be respected by the
federal government.</span>
Answer:
Songhai empire, also spelled Songhay, great trading state of West Africa (flourished 15th–16th century), centred on the middle reaches of the Niger River in what is now central Mali and eventually extending west to the Atlantic coast and east into Niger and Nigeria.
Explanation:
A. they could not pass a literacy test.
