My PE teacher used to be a professional swimmer, he taught us a lot about official contests rules and stories he experienced, he's one of our favorite teacher.
logos is using logic so it could be that, and ethos is using a character or tries to convince you of its credibility so that is another option. Decide if their trying to appeal to credibility or if the statistic is more important.
I believe that C is the correct answer
He was a promintent American abolitionist,author an orator.
