Reconstruction ended because of the compromise of 1877
In Aztec social hierarchy, people who are called "Serfs" are the ones expected to support the upper class. They belong to the lowest social class in the Aztec culture and required to do labors for the nobles. As for the Incas, "Commoners" (farmers, artisans, servants, etc.) are required to support the higher class for they do not practice slavery. Majority of Inca's population belongs to the commoner class.
Statement B is true: the Mormon faith is officially called The Church of Jesus Christ of Latter-day Saints, and the other name comes from their holy book, The Book of Mormon. It was founded by Joseph Smith.
