I think it is a run-on sentence.
Answer:
A.To prove he is right, Goha fakes his death.
Explanation:
The correct way to write the sentence, "To prove he is right, Goha fakes his death." is by adding a comma after the dependent clause "to prove be is right" because it not only separates the dependent and independent clause but also adds a pause.
The other options are wrong because a comma has the function of separating items or ideas in a sentence to enhance understanding.
I feel like this question is very, very debatable. Your answer will depend on the religion you follow/ are studying or the religion that your school/teacher/family appears to encourage you to follow, as well as your personal beliefs.