Me choose the subject and theme of this excerpt

The child is not kind. I wouldn't choose A. By that I mean that the child is not kind by nature.

He did not receive the dog as a gift from his father. That eliminates E.

The subject therefore is the dog was taken into a very abusive home.

The theme is the 4th one down. Those who are abused will abuse something or someone weaker than themselves. No where do we get the idea that the child is empathetic. The dog amuses him, nothing more.