I believe the answer is c
By making the civil war only about the preservation of slavery against abolitionists. Though this was one reason, It was originally started because they felt that the federal government was being unfair and unjust towards them in the way that they taxed them.
The fourth option is the right one. The Swahili city-states grew during the second half of the first millenium thanks to the intense trade activity in the Indian Ocean, <u>India and China had been important trade centers since antiquity and a great trade network had been built over the centuries</u>. Besides the connections between coastal cities of the Indian Ocean, in it's northern part, by the coast of Persia, passed the Silk Road, the trade route that connected Europe to China throughout the Middle Age.
yes
because the missouri compromise was for slavery and the nullification crisis was a confrontation between south Carolina and the federal government while the compromise of 1850 was disputes to end slavery
