Teotihuacan is significant because A)
it served as the first Aztec capital before they moved to Tenochtitlan,
B)
it served as an important economic, social, and religious center in classical
Mesoamerica
C)
it was eventually conquered by the Spanish, leading to a large population
of mestizos in the region.
D)
it remained isolated from the other classical cities of Central and South
America, unlike other major cities of the time.