What is the vague pronoun in the sentence stuart told his dad that his bike had a flat tire

Which sentence best uses transitions to explain how the evidence supports the reason in the accompanying claim statement? clearly, rainsford did not kill zaroff in self-defense. this statement, therefore, shows that rainsford killed zaroff in self-defense. so, rainsford is not justified because there is no proof he acted in self-defense. in the end, rainsford is not justified in killing zaroff.