According to Reed's "Forest Development the Indian Way," Until the Recent

According to Reed's "Forest Development the Indian Way," until the recent incursion of colonos (colonists,such as ranchers and farmers) ,Guaraní villagers

A) had no contact with people in other parts of South America.
B) traded with outsiders for machetes, hooks, soap, and salt.
C) developed an indigenous market system that tied villages together.
D) worked for decades as rubber tappers to augment their subsistence economy.