Which civilization's influence could be found in both the maya and aztec civilization?

The earliest civilization in Mesoamerica was the Olmec. These people lived along Mexico's Gulf Coast between 1200 BCE and 400 BCE. In comparison to the Maya and Aztec, little is known about the Olmec, however; it is clear that both Maya and Aztec culture were influenced by the Olmec.

Was gonna say the answer but that’s the answer above me