How did rivers contribute to the development of trade networks among early civilizations? A. Animals drinking from rivers led to hunters meeting along their banks. B. Moving goods by river is much easier than over land. C. The most valuable crops only grow close to rivers. D. Different groups living along rivers often spoke the same language.

B. Moving goods by the river are much easier than overland.

Explanation:

Rivers were vital to the sustainability of early civilizations because they were essential for supplying a constant source of water which helped in irrigation for good agriculture, and provide transportation networks for these people to exchange goods with neighboring communities. The trade network of the developed early civilization was so sophisticated that goods traveled oceans for example trade between Harappan and Mesopotamian civilizations.    

c. troops marched forward in close formation against newer, more accurate weapons