Which of these characteristics i not true of early hunter-gatherers?

a. they lived in small clans of around 20 to 30 people.

b. they lived in caves or simple huts.

c. they carved figures out of stone and ivory.

d. they traded extensively with other communities.

The answer to this question is: They traded extensively with other communities.
Early hunter-gatherers only gathered enough resource to sustain their group before they finally decided to move onto other places.
These hunter-gatherers tend to see other communities as threats that will compete with them in obtaining food resources, so trading activities will be really unlikely