Concerning the land bridge theory which of the following statements are true? select all that apply. A. it is a native american theory. B. it is a scientific theory. C. it tells the story of coyote the trickster. D. it offers an explanation of how washingtons first people came to be here. E. it offers an explanation of when washingtons first people came to be here. F. it describes a time when sea levels were much higher than they are now.