Question

How do we know the Olmecs were technically 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 1

C. They used latex from trees to create rubber.

Step-by-step explanation:

I just took the test

Answer 2

I believe the answer is B. B. They invented tools using stones and metal