I believe it is A, semicolons as it separates the the thoughts as you're reading.
En un instante perdi lo que mas queria, mi mejor amigo.
This is a part of his supreme ordeal. His return home is much broader and includes his supreme ordeal which is what you described in the question. He fought them because he wanted to stop them from taking his wife Penelope. This was during the competition where they had to prove themselves.
Answer:
In my opinion, the correct answer is clarity. By using the repetition, the author tries to clarify what this problem isn't - by its nature it isn't Negro, Southern, or Northern. And then, he affirms what it is - it is American. Therefore, he says that compartmentalizing this problem is not going to help. People have to understand it for what it really is - everyone's problem, the problem of the nation itself.
Explanation: