The author's tone of the following passage (paragraphs \( 87-89 \) ) is best described as If you're one of those GMs who believes that I can play in the NFL, I just want to say thank you. I appreciate you, and I'm excited for the opportunity to play for you and prove you right. And if one you're of those who is doubting me ... well, I want to thank you, too. Because you're what keeps me motivated every day to work hard and play even harder. Back when I was eight years old, I played because I loved the game. I still do. But now, I also play because I believe it's my purpose. I know that it won't come easy. Nothing comes easy. But I will fulfill that purpose. I have no doubt. A. grateful B. confident C. spiteful D. arrogant