The best answer here is the internal rhyme between cross and Albatross. The easiest way to work through what the best answer is is process of elimination. If you check each of the other choices, you'll see that the assonance mentioned really doesn't lend anything to the reading. The same is true for the alliteration choices. While they exist, they don't help to emphasize the importance of the Albatross. Conversely, the internal rhyme does highlight this because the reader is already anticipating the sound to come.
