Unlike many hunter-gatherer groups, the Natives who lived at Poverty Point are believed to have had a complex society heavily involved in a trading network. Choose all features of Poverty Point that made it ideal for heavy trader traffic.

A It was built on the Mississippi River, allowing people from miles away to travel there.
B It had the first road system in Louisiana, allowing traders to get in and out quickly.
C It was built on a clearing without trees, allowing the location to be found easily.
D It had a dock that allowed people in boats to stop and trade in the plaza.
E It was built on a natural ridge that prevented flooding from the rivers.