Read these excerpts from the way to rainy mountain by n. scott momaday:

you know, everything had to begin, and this is how it was: the kiowas came one by one into the world through a hollow log. they were many more than now, but not all of them got out.
they called themselves kwuda and later tepda, both of which mean “coming out.” and later still they took the name gaigwu, a name which can be taken to indicate something of which the two halves differ from each other in appearance.

which sentence best explains how the historical description of the subject matter enhances the meaning of the mythical description?

a. it makes the myth more memorable by using imagery to achieve a reflective tone.
b. it clarifies the myth by explaining what coming into the world through a hollow log actually meant.
c. it supports the myth by providing facts about how the kiowas first named themselves with words that mean “coming out.”
d. it expands on the myth by describing the beginning of the kiowa tribe from the first-person point of view.