Which of the following is considered the mother civilization of mesoamerica? a. olmec b. aztec c. inca d. maya

I think that the Olmec were considered the mother civilization of Mesoamerica. 

"The concept of the Olmecs as a mother culture was first formally raised by Alfonso Caso at a 1942 conference on the "Olmec problem" in Tuxtla Gutiérrez where he argued that the Olmec were the "cultura madre" of Mesoamerica."

A. Olmec

Require the nobles and clergy to pay taxes.