First second and the last one
He wants to know who chiron is and who HE is himself as Percy.
Hi there! I feel that C.) would be the best answer for this question. Fighting in a war wouldn't show that you value the culture of your homeland, like shown in answer A.). B and D seem irrelevant to the question at hand, and since the language of a country relates directly to the culture and answer C.) shows that Juhan values it, it'd be safest to go with that answer.
The proof to support your argument.
That he wanted more love from others
