The correct answer is A. The boy's epiphany in "Araby" reveals the futility of human pursuits.
At the end of the story, the boy has several disappointments. His uncle is late, the bazaar is nearly closed by the time he gets there, and the only objects he finds are boring. All of his expectations have failed to live up to reality. The boy realizes that his relationship with Mangan's sister will end up the same -- better in his imagination than in reality.
In this way, the story says that life itself is disappointing and fails to live up to our imaginations. Answer A, that human pursuits are futile (or pointless), best encompasses the boy's epiphany.
