“The peaks of the Rocky Mountains are higher and more jagged than the peaks of the Appalachian Mountains becausea) glaciers moved across the Rockies during the last ice ageb) the tectonic forces that created the Rockies were very strongc) volcanoes formed the peaks of the Appalachiansd) the Appalachians have been worn down by rain, ice, and wind over time”,”d) the Appalachians have been worn down by rain, ice

“The peaks of the Rocky Mountains are higher and more jagged than the peaks of the Appalachian Mountains becausea) glaciers moved across the Rockies during the last ice ageb) the tectonic forces that created the Rockies were very strongc) volcanoes formed the peaks of the Appalachiansd) the Appalachians have been worn down by rain, ice, and wind over time”,”d) the Appalachians have been worn down by rain, ice

and wind over time”