Answer:
I believe it's bartering. or letter D
Explanation:
The Olmec used wood and rubber from trees as well as mineral resources to make goods. Minerals are things like stone that come from the earth. People also bartered or traded resources and goods. They did not use money like we do today. Examples of things the Olmec made and bartered with include clay pottery, They also made clay sculptures and masks. STARIGHT FROM NOTES
