Select the correct answer.
Which sentence best describes the theme of the story "A horseman in the sky" by Ambrose Bierce?
A. It is a story about family values and how they shape and individual's personality.
B. It is a story about a journey toward discovering one's identity despite one's upbringing.
C. It is a story about an officer's extraordinary experience behind the lines of battle.
D. It is a story about the Civil War and the disastrous effect it had on soldiers.