In what ways were the maya, aztec, and inca civilizations similar?
a) all three selected rulers through a system of heredity
b) all three domesticated animals such as llamas
c) all three were conquered by spanish conquistadors
d) all three followed polytheistic religious beliefs

The correct option is C

Mayan culture refers to that of a Mesoamerican civilization that stood out over 18 centuries in numerous socio-cultural aspects such as its hieroglyphic writing, one of the few fully developed writing systems of the pre-Columbian American continent, its art, architecture and its remarkable numbering systems, as well as astronomy, mathematics and understanding of ecology. It was developed in Guatemala and southeastern Mexico, also in Belize, the western part of Honduras and in El Salvador. In the sixteenth century the Spanish Empire conquered the Mesoamerican region, and after a long series of military campaigns the last Mayan city fell in 1697. The Inca or Inca Empire was the largest empire in pre-Columbian America. To the territory of the same one it was denominated Tawantinsuyu and to the period of its dominion is known, in addition, like incanato and / or incario. It flourished in the Andean region of the subcontinent between the 15th and 16th centuries, as a consequence of the apogee of the Inca civilization. It covered nearly two million square kilometers between the Pacific Ocean and the Amazon rainforest, from the outskirts of Pasto (Colombia) in the north to the Maule river (Chile) in the south. The Inca civilization emerged from the highlands of Peru sometime in the early thirteenth century. Its last bastion was conquered by the Spaniards in 1572. The Aztec Empire - also called, in a minority, Triple Alliance, Mexican Empire or Tenochca Empire - was an entity of territorial, political and economic control that existed in the central zone of Mesoamerica, during the Late Postclassic, before the Spanish Conquest.

Word of mouth.