Which of the following did the maya, aztec, and inca all have in common? . a. they all grew corn as their primary crop.. b. they all lived mostly in a mountainous region.. c. they all were united into an empire.. d. they all had contact with the spanish.

They all grew corn as their primary crop and this among the following options did the Maya, Aztec and Inca all have in common. The correct option among all the options that are given in the question is the first option or option "A". I hope that this is the answer you were looking for and it has come to your help.