Correct, there isn’t anything else you can do to the sentence.
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.
