The central idea of the paragraph in this exceprt the author adopts is that her parents barely dealt with the circumstances of living under a dictatorship despite the humiliating tributes done by Trujillo they unwillingly made part of, so the best idea is the last option "<em>The author’s parents tried to get by in the dictatorship, but felt humiliated by the tributes they were forced to participate in."</em> As expressed in the passage, the author's parents tried to keep a low profile to avoid detection from police, but having a handful of daughters made it difficult, and they could not take any risks but to accede to stand the dictatorship.
Well, angst is a complex and complicated emotion. One might even say this emotion could result in spite which often drives artist in creating high expectations of success. This spite would come from the deep feeling of dread that is angst for if one feels imminent doom than they'd feel the need to defend or prove themselves. On the other hand one might say angst could hold an artist back in their work allowing the angst to lead to pure depression therefore lacking or having no motivation to complete or even start a work. Some achieve great works due to pure angst. Take Edgar Allen Poe for example, a man ridden with angst who created terrifying yet magnificent stories such as "The Raven" and "The Tell-Tale Heart". Angst is not what defines an artist temperament nor expectations of success for it is the artist that determines how their angst is channeled into such things.
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If you mean what side does he identify with, the answer is neither. The prince is a neutral party.