Which of the following best describes the theme of xenia, or hospitality, in books 1-6 of the odyssey?

a) athena encourages telemachus to embark on a journey seeking news about his father.
b) the suitors slaughter the palace's livestock for their feasts.
c) nestor and menelaus welcome telemachus, offering him food and rest without even knowing his identity.
d) nausicaa personally escorts odysseus to her father's palace.