Which of the following accurately describes the origin of the Toltecs? (A) They filled the power vacuum left by the decline of Teotihuacan and tapped into the trading network in the central valley of Mexico. (B) They built a major agricultural base without developing substantial trade. (C) They were a distinct ethnic group that moved into Mesoamerica from North America around 1000 ce. (D) They developed a distinct culture in their cities and architecture, so they were not influenced by other Mesoamerican peoples.