Health Clinic Inc

Health Clinic Inc. has no written employment manual or oral discharge policy, avoids abusive treatment of its staff, and acts to prevent illegal and unsafe activities. The clinic freely hires and fires its employees, who are similarly free to quit at any time. 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.