I believe it is A. Hope it helps!
Answer: The last word of Keesh was "It is not for a boy to know about witches, and I know nothing about witches. I only have means whereby I may kill an ice-bear with ease, that's all. It would be headcraft, not witchcraft".
In "The Story of Keesh" by Jack London, the people of the tribe did not believe that Keesh had hunt a large polar bear by himself, so they accused him and his mother of witchcraft. It required dignity and manhood for him to defend himself and speak against the elder hunters who disliked him.
I believe this to be false as of the fact that a paradox would be like this "<span>If "this sentence is false" and you agree it is true then the statement would be false but that would make it true" and so on.
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True, the supporting details should some in the following paragraphs (that's what I learned anyway - it may be wrong)