Why would Native Americans have been supportive of river commerce?

A:It increased development of their civilization.

B:It would lead to increased economic profitability.

C:Their goods were safer being moved in boats.

D It provided for additional military support.

I think the answer is B because selling the river would bring in more money

B: It would lead to increased economic profitability.

Explanation:

With river trade, Native Americans were able to establish lucrative trade in their region, as they could transport their products cheaply and quickly to the standards of the time. With the arrival of Europeans, Native Americans had to change their way of life, including the economic factor, so it was necessary that a trade was established between the native peoples. River trade would lead to increased economic profitability, so Native Americans supported this initiative.