This question is for 4804242084 and Sunflower77798 so if you answer and you aren't these people ur answer will automatically be reported ~{(ツ)}~

(find the gem :,>)

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