Please Post the story So I can answer your question and put who character S is.
Your tone
Let's look at the other choices first. Your credibility is your ability to be believed as trustworthy in regards to the subject. Whether you're talking to a group of teenagers or professional adults, your credibility doesn't change. Your clarity also should not change based on the audience because you want to be clear in your message at all times. Also, your purpose should be the same no matter the audience. The only thing that would change is your tone. The way you approach a crowd of teenagers would vary greatly from the way you'd approach a room of professionals.
Answer:
I love this, I didn't find it confusing at all and it was very clear about what was happening. I'm sure your Honors class will adore it!
It shows the love his dad has for him and his trust in his son.