Owen Is an Employee of Paving Inc

Owen is an employee of Paving Inc., which is performing a contract for the federal government. Owen learns that Paving is double-charging for the work. If he publicly reports the fraud, he may be protected by law from being fired from his job . With respect to the employment-at-will doctrine, this is

A) an example of the doctrine.
B) an exception based on contract theory.
C) an exception based on public policy.
D) an exception based on a statute.