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 .
According to the above context, choose the best option to answer the following question.
Question: Why was the vet so upset ?
Options:
A. None of the above choices .
B. The vet had to work the early morning shift .
C. The procedure had not worked .
D. The vet was n't paid .


C