Which of the choices below can be true about an Native American earth diver creation myths?

Select one or more:
a. The Cherokee creation story features an earth diver.
b. Creation stories are demonstrated to be ex nihilo stories.
c. Earth diver stories feature the earth emerging from water.
d. The earth diver can be an animal which dives under the water to bring up a small bit of mud to help bring about the creation of the world.