What made slavery legal was D. the Bill of Rights, Because amendment 13 officially abolished slavery in the United States and continues to this day.
So D. is your anwser.
Hope this helps. :)
Freedom of religion speech and press
Egypt's entrance into the Second Intermediate Period was caused by decentralization and quarreling, which left it helpless against assault by the Hyksos, who mounted a hostile that succeeded to a great extent due to the component of shock and their military leeway of steeds, chariots, and composite bows. The time of control by the Hyksos is recorded as "run by remote sovereigns" and at last offered path to the Middle Kingdom in the mid-1500s BCE, as Kamose and afterward Ahmose effectively crushed the Hyksos and drove them out of Egypt. In this way, Egypt tried to recapture the domain it had lost under the Hyksos and in the long run vanquished as far north as the Levant close Syria and south into Nubia.
Well, for one, Haiti really didn't have anything to offer the United States. No territory. Nothing to trade. Nothing really. But also, the idea of Africans rising up against an oppressive white government and overthrowing them made the United States very nervous, especially since we, at the time, had institutionalized slavery and a culture that was very much steeped in racism. Basically, we were afraid that if we supported the revolution in Haiti, it would encourage our own slaves to revolt against Southern slaveholders.