How might the vegetarian tree finch, which feeds on fruit, have evolved?

How might the vegetarian tree finch, which feeds on fruit, have evolved? Please Explain your choice.

1. Vegetarian tree finches would not breed with other species of finches.
2. Vegetarian tree finches (with beaks adapted to peeling the skin from fruit) could out compete other birds for limited food.
3. Vegetarian tree finches reproduced at different times than other finches in the area.
4. None of the choices are correct
5. All of the choices are correct