What is the coastal plain?(1 point) Responses a tall, steep area where rivers form rapids and waterfalls a tall, steep area where rivers form rapids and waterfalls a raised area in the foothills of the Appalachian Mountains a raised area in the foothills of the Appalachian Mountains a flat, lowland area on the coast of the Atlantic ocean a flat, lowland area on the coast of the Atlantic ocean a series of mountains and mountain ridges that are related
