I want to know the answer to the following question:
Who held sway in the mountains of Oaxaca?
All the background I'm provided with is that "The Olmecs, who flourished from between 1200 BCE to about 400 BCE in the coastal regions of the Gulf of Mexico; the Zapotecs and the Mixtecs, who held sway in the mountains of Oaxaca and the Isthmus of Tehuantepec; the Maya in the Yucatan (and into neighbouring areas of contemporary Central America); the Purépecha in present-day Michoacán and surrounding areas, and the Aztecs/Mexica, who, from their central capital at Tenochtitlan, dominated much of the centre and south of the country (and the non-Aztec inhabitants of those areas) when Hernán Cortés first landed at Veracruz.". Is that enough to answer the question?
Answer: yes