Which of the following is a sentence fragment?

a. hiding in the tree fort he had built as a kid.
b. checking his mail each day was always fun.
c. realizing you are getting older is sobering.
d. knowing he would be late, she took a nap.

Twenty years gone, and i am back again on my own island. as for my change of skin, that is a charm athena, hope of soldiers, uses as she will; she has the knack to make me seem a beggar man sometimes and sometimes young, with finer clothes about me. it is no hard thing for the gods of heaven to glorify a man or bring him low. —the odyssey, homer based on what odysseus says in the passage, what has he learned? humans can become like gods. humans are under the gods’ control. humans can change from beggars to soldiers.

Respond for free points because i don't have a question anymore.

Has anyone ever read the poem “at a window “ by carl sandburg? there are a few multiple choice questions i have to answer about it.