From Emperor to citizen, the speaker's attitude towards his childhood years was unsatisfied and unhappy.
He graved for change from a person who's life is less to complex to simplier one. He's childhood years was full of dreams that he wants to be a man with power like an emperor, but indeed like an ordinary citizen.
The third one.
O My face turned bright red and my eyes swelled with tears when the teacher called on me and I didn't know the answer
I'd say C the quest
the theme is important too, but then it all depends on the quest.....
Hope I helped !!