What did Marqués de Rubí mean when he told Spain there was a difference between the amount of land they occupied and the amount of land they could control?

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