Which word correctly completes the sentence?

in chess, one can't always be certain what next move should be.

a.
one's

b.
ones'

c.
ones's

In about two hundred words, explain how the author's use of folktales and symbolism add meaning to the story and convey the central theme of the novel: the disintegration of the traditional igbo society as a result of its contact with european practices and beliefs.