Which mountain range, stretching from Alabama to Newfoundland, is the oldest mountain chain in North America and includes the Blue Ridge and Smoky Mountains?

• A Rocky Mountains
• B Appalachian Mountains ✓
• C Sierra Nevada
• D Cascade Range

The Appalachians formed roughly 480 million years ago during the Ordovician Period and were once as tall as the Himalayas before hundreds of millions of years of erosion.