Answer: C) not liable, because the statement was an opinion.
Step-by-step explanation:
Breach of contract is described as legal promise which is broken by a contract-involved party that is done between two or more parties to bind them into an agreement or contract to keep that lawful and formal promise
According to the question, Carlton is not legally answerable for Beth not getting well in a week because he gave a opinion in the form of belief that Beth can get well.As Carlton did not make a legal promise is cannot be considered liable for Beth not getting well.
Other options are incorrect because Carlton is not answerable to Beth's situation legally. Surgery can be considered for contract but in this case it is not lawful agreement. Beth is neither getting excused for paying Carlton .
Thus , the correct option is option(C).