How do we know the olmecs were technologically advanced? a. they created the first version of a calendar. b. they invented tools using stones and metal. c. they used latex from trees to create rubber. d. they were the first to use a writing system.

Answer;

C. they used latex from trees to create rubber.

Explanation;

The Olmec were the first known pre-Colombian Mesoamerican civilization.

The Olmec means; it was Aztec for "rubber people". Olmecs used latex from rubber trees to create rubber. They were technologically advanced.

They carved stone heads. They are believed to be portraits of Olmec rulers. They can be found at San Lorenzo, the oldest known Olmec settlement. They had a complex society and were building towns while the rest of Mesoamerican civilization was still unsophisticated.

sonar maybe? ? i dont know the choices