It is time to go home now. I am on a bus on a rainy day, and a woman with a dog gets on the bus. It is a big dog and its feet are not clean. I don't want the dog to sit next to me. But the woman says to the conductor, "oh, I pay for my dog. Can he sit here like the other people?" The conductor looks at the dog and says, "yes, madam. But like other people , he must put his feet under the chair." I don't want the dog to sit next to me, because  _  .
the dog is big the dog is not clean the dog has no ticket the dog isn't mine