The answer choice C is correct
The Enenra was a Japanese mythical creature formed of smoke and shadow.. an elemental monster! My favourite of the Japanese folklore
The distinct physical aspect is that he is blind, which back then, it was thought that you could see the past and the future. He then asks him to sing about Troy, Odysseus does this act to see the reaction of the people, and to also see if they are on his side or not just before he reveals his identity.