The sharp tone of the two indicated they were having a fight . He loved observing human - human interaction so he decided to pay attention to what was said ; besides , the boy 's voice was irresistible . " I see no reason why my dog ca n't stay here with me ; it 's a completely harmless pet and never attacked anybody . I ca n't just leave him outside in the cold , he 'll probably feel lonely ! "

Question: What is the most likely reason the fight started ?
Answer: None of the above choices .It appears they are arguing over whether or not a dog can stay at their place .They started fighting because he did not pay attention when he should have .They started fighting because the dog was left out in the cold .