I think the best answer would be C because in ap human geography they face resource problems.
There are limited amounts of resources in a general area. Some civilizations may not have the ability to produce resources that they need. That makes 2 routes:
1) cooperation: They can cooperate with another people group that lives in a different region and trade with them
2) conflict: They can attack/raid another people group in a different region for the resources
hope this helps
Can you be more specific thanks
Answer: my guess is that they interacted with travelers coming on accident.
Explanation:
