Egypt's very soil was born in the Nile's annual flood; with the flood came the life-giving mud that made Egypt the granary of the ancient world.  (   )

Egypt's very soil was born in the Nile's annual flood; with the flood came the life-giving mud that made Egypt the granary of the ancient world.  (   )

A.埃及的土地就是尼罗河每年乏滥而形成的。河水泛滥，万物得以生长，埃及就这样成了古代世界的粮仓。

B.埃及的土地就是尼罗河每年泛滥而形成的。河水泛滥带来泥沙，万物得以生长，埃及就这样成了古代世界的粮仓。

C.因为每年河水泛滥，泥沙形成了埃及的土地，万物得以生长,埃及就这样成了古代世界的粮仓。

D.万物之所以能生长，是因为埃及的土地是尼罗河每年泛滥带来的泥沙而形成的。埃及就这样成了古代世界的粮仓。

正确答案是B