In our hearts , we were afraid it had not . The vet on graveyard shift was the same one who had seen him the first time . When she looked at the numbers and found out that he had already had the surgery , she got tears in her eyes .

Question: Why was the vet so upset ?
Answer: The vet was n't paid .The vet had to work the early morning shift .The effort was in vain .None of the above choices .