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 .
According to the above context, choose the best option to answer the following question.
Question: What may be the reason for postponing surgery ?
Options:
- They were getting better .
 - They were sick .
 - They did n't think anything was wrong .
 - None of the above choices .


They were sick .