Early pioneers faced both physical barriers and helpful gateways on their journeys to America's west. Choose ALL true statements about the gateways that benefited these pioneers.

A.) The paths and roads were already created, so people head west any time.
B.) Mountain passes provided faster routs for traveling over or around a mountain.
C.) The soft sands and the dry climate of the desert is what drew people to the west.
D.) Flat grasslands of the Great Plains had mild weather and were easy to travel through.
E.) Midwestern swampland was easy to travel through and full of animals to hunt for food.