You didn't italize or mark the phrase, but I see one good candidate:
"The circus animal trainer" is in a way another name given to Mervin, a kind of "renaming" him: this is called an appositive phrase, so if this was the phrase appositive phrase is the answer! (also, I don't see the other phrases here).
Rawrrrrr your cat is cutee:)
According to this excerpt, what Paul's father sees most likely makes him realize that Paul is not the one responsible for Ghost Wind's injuries.
The correct answer is B.
Paul's father knows he is a good horseman; in fact, he says: "<em>one of the best I've ever seen</em>". This and the fact that he walks around Ghost Wind inspecting him "<em>long and hard</em>" shows he suspects Paul is not the one responsible for his injuries, although Paul says he is.