Answer: d) an exception based on a tort theory.
Step-by-step explanation:
Tort law states about the legal wrong that is done by someone.In case of termination of employment as per employment-at-will , tort law's exception states that it can cause legal action towards the termination of employment relationship,misrepresentation of job offer etc.
According to the question, Mike's situation is related with the tort law's exception regarding employment-at-will. As he was fraud captivated towards the job and got terminated in short while.Thus, legal action against Landscaping company can take place .
Other options are incorrect because contract theory, theory of doctrine and policy of public does not deal with employment fraud.Thus, the correct option is option(d).