Which of these sentences includes an infinitive phrase?A.He fell into the river and waited until they pitched the tent to change his clothes.B.When I saw what was in the box, I thought back to the very first time I played softball on a league.C.By the time I'd made it to Algebra class, I had worked myself up into a tension-filled frenzy.D.My closet is empty except for my cheerleading outfit and the jade green formal I wore to the prom