Answer:
When you picked Rose, I was happy for you. That was the first time I knew you had any sense. I said . . . that man Troy knows what he's doing[.] Jim Bono, Troy's best friend, looks up to Troy in part because he had the good sense to choose Rose.
Explanation:
On is the only preposition in this sentence. A preposition shows location, such as, on, over, beside, etc.
