Which statement identifies the shared economic characteristics of the river valley civilizations?(1 point)
A The river valley civilizations all used sailboat travel, pastoral groups, and international trade.
B The river valley civilizations all had interregional trade, pastoral groups, and isolated territories.
CThe river valley civilizations had similar geography, trade, and goods across regions.
DThe river valley civilizations traded on the Silk Road, which fostered all trade, across regions.