What did the burial artifacts found in the harlan mound site prove? a. mound builders lived in oklahoma 9,000 years ago. b. mound builders invented clovis spear points. c. mound builders had a very extensive trade network. d. mound builders hunted megafauna.

The answer is: c. Mound Builders had a very extensive trade network

The artifacts that found in the burial have several similarities with cultures that located from other places outside their territory (some of them are very similar to those found in south america and Europe). From this, we can conclude that their culture interact with many different culture through extensive trade networks.

d: their own individual powers within the new goverment

me on my last question.