C. Suffering. Siddhartha was a prince who spend all of his young years behind confined walls in a lavish estate. His father did this to prevent him from seeing the suffering that was common among the regular people. When Siddhartha climbed the wall in secret, he was astonished by the poverty, hunger, and disease among the commoners. This inspired him to seek inner understanding about ending suffering and started his path of becoming Buddha.
Alright look, I am not 100% sure, but I am going to try to help you the best I can. I personally think it's in government archives because it would have been stored away there and would most likely be preserved so people can learn about it and it's origins.