C Why did early settlers of Oklahoma choose sites along rivers as a place to establish villages and towns?

They need the water to support their agriculture.

Explanation:

At that time, irrigation technologies that can transport water to a far location hasn't been fully developed.

Building a settlement near the rivers will give the settlers with the capability to obtain enough water sustain their crops and feed their farm animals. This help them in producing enough food source to survive and steadily improve their economy.

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islam spread slowly through much of africa through trade and preaching.