It is c) rights in the legal system I hope this helps :)
The abolitionist movement began as a more organized, radical and immediate effort to end slavery than earlier campaigns. It officially emerged around 1830. Historians believe ideas set forth during the religious movement known as the Second Great Awakening inspired abolitionists to rise up against slavery.
Constantine
Specifically, Constantine I, the 57th Emperor of the Roman Empire. He moved the capital to Byzantium, and renamed the city to Constantinople (now Istanbul). He was also the first Christian emperor.
Article VII stipulated that nine states had to ratify the Constitution for it to go into effect.
