What is the coastal plain?(1 point)%0D%0AResponses%0D%0A%0D%0Aa flat, lowland area on the coast of the Atlantic ocean%0D%0Aa flat, lowland area on the coast of the Atlantic ocean%0D%0A%0D%0Aa raised area in the foothills of the Appalachian Mountains%0D%0Aa raised area in the foothills of the Appalachian Mountains%0D%0A%0D%0Aa tall, steep area where rivers form rapids and waterfalls%0D%0Aa tall, steep area where rivers form rapids and waterfalls%0D%0A%0D%0Aa series of mountains and mountain ridges that are related
