Why can the reader trust and believe the author's account of being in a tornado?

Responses
A She is now an authority on life-threatening accidents.She is now an authority on life-threatening accidents.
B She is giving only first-hand knowledge to the reader.She is giving only first-hand knowledge to the reader.
C She has no memory of the story or the events she experienced.She has no memory of the story or the events she experienced.
D She cannot be trusted to tell the truth because she never liked tornadoes.

B She is giving only first-hand knowledge to the reader.