Read the following context and choose the best option to answer the question.
Context: His vet decided to postpone his surgery , and asked permission to do some blood work . The results were good and bad . He did n't have a fatal disease , but there was a chance he had an incurable illness . Not untreatable , but incurable .
Question: What may be the reason for postponing surgery ?
Options: 
A. They were getting better .
B. They were sick .
C. They did n't think anything was wrong .
D. None of the above choices .


B