The first response is the most accurate in describing the difference between beliefs about the origins of Native Americans among Native Americans and anthropologists.
Anthropologists believe Native Americans migrated across a land bridge, but Native Americans believe they were here from the beginning of time.
This response highlights the contrast between the scientific view, which suggests migration from Asia via a land bridge (Beringia), and the traditional beliefs of many Native American tribes that they have always existed in their ancestral lands.