Describe the costs of transporting porcelain by land or by sea in ancient China. In other words, what are the drawbacks of each method of transportation?

How were the okanogan highlands formed? a. by subduction, which caused huge folds in earths surface b. as a result of retreating glaciers carving great valleys into the earth c. when molten rock from under the earth approached the surface d. when the collision of volcanic island chains and ocean rocks formed new earth