The Olmec civilization’s economy was based on the sharing of resources. trade with other civilizations. the use of currency to buy goods. available resources and bartering.

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

d the wampanoag the pilgrims because the pilgrims protected them from their native americans foes.