After reading all the options which you attached I recognized only one correct answer and I am pretty sure that the reason why Elpenor is labeled as part of the road of trials is being revealed by the last option from the scale represented above. So, such characteristics mean that It shows Odysseus at the low point in his challenges.
In organizing the events of Odysseus’s quest, why would the text in The Odyssey - Elpenor be labeled as part of the road of trials? It shows Odysseus facing something about himself. It shows Odysseus at the point where he departs. It shows Odysseus encountering supernatural beings. It shows Odysseus at the low point in his challenges.