wWhich of the following best summarizes a cause for the development of river valley civilizations?
AThe spread of hunting-gathering practices across Africa, Asia, and Europe
BThe invention of techniques for planting crops and herding animals
CThe development and refinement of warfare strategy and tactics
DThe diffusion of major religions, such as Christianity, Hinduism, and Islam
AThe spread of hunting-gathering practices across Africa, Asia, and Europe
BThe invention of techniques for planting crops and herding animals
CThe development and refinement of warfare strategy and tactics
DThe diffusion of major religions, such as Christianity, Hinduism, and Islam