The answer is option B or "due to Robert's failure to follow his own destiny, his life ends in a tragedy." All options given in this question have a formal more professional style of saying Robert failed to follow his own destiny and because of not doing so he died in a very tragic way but it's the objective tone that separates the correct answer from the rest. Objective means to say the truth and not show any emotions toward that truth and you aren't being influenced by any personal feelings. Option B is a objective tone because it's giving the facts with no remorse and it has no personal feelings or sympathy involved.
