Answer: I would contend that the right answer is the E) The thirst for knowledge and new experiences.
Explanation: Just to elaborate a little on the answer, it can be added that there are several references in the poem, and in this particular passage, to this concept, which turn it into a recurring theme. For instance, the speaker says: "How dull it is to pause [...] To rust unburnish'd" and "[...] this gray spirit yearning in desire to follow knowledge like a sinking star," just to name a few. Like Ulysses before embarking upon his final and challenging voyage, the speaker is also aware that his end is approaching, but rather than waiting for it passively, he decides to face the challenges and the struggles, and, moved by his thirst for knowledge, he keeps pushing onward. The death of a close friend at a very young age inspired Tennyson to write this poem in 1833.
The young men could not uproot the tree themselves so they asked the chief for help, the chief was able to uproot and bring the tree to its side so when the wife went to balance herself on the branches, she fell in a body of water below it.
Its main character, and the narrator of the book, is Christopher Boone, a 15 year old with autism. Mark Haddon, the author of The Curious Incident, never lets Christopher stray from his unique interpretation of the world around him, which is what allows the readers to feel they are within his mind.
In Oedipus rex, sphinx symbolises the Oedipus courage, when Oedipus courageously without being scared of the death accepted the riddle of sphinx. He gave the correct answer of his riddle. Which cause him disappear and he died at that very moment.So it was the courage that caused a great set back to the death.