the fact that copper and gray northern flint was found at the poverty point suggests that poverty point inhabitants

a) used materials they mined from earthworks
b) traded for goods from faraway places
c) had the first indoor plumbing
d) experienced a change in religious beliefs

2 answers

I'll glad to check your answer.
http://www.crt.state.la.us/archaeology/virtualbooks/poverpoi/trade.htm