The answer is: [B]: "the composition of the poem" .
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Answer: To illustrate Japan's isolation in the 1800s.
Explanation: The outside source in this excerpt (the first few lines) clearly describes how while the rest of the world was dealing with monarchies, wars and developing new technologies like trains and wheels, Japan decided to be totally closed off from all of that, and they concentrated just in painting screens for 200 years.
I'd say
1. Alonzo went to the music festival
2. Carmen went to the same music festival
3. Alonzo met Carmen at the music festival
(if that doesn't sound right it's probably the food ad thingy)