Letter C is the best choice for this question: An ambitious prince is unable to save himself or his family after realizing too late how much his desire for power has cost him.
That seems to be the plot of Macbeth, a play by Shakespeare in which the hero of the story gets too ambitious for his own good. His desire for power leads him to make mistakes that will eventually cost his wife's sanity as well as their lives. That is what a typical tragic hero is all about: he makes so many mistakes based on his error of judgement that he brings about his own destruction.
Shakespeare's tragic plays often - and obviously - present this type of hero: Hamlet, Othello, Romeo...