In Anderson v. Meyer Broadcasting Co., 2001 ND 125, 630 N.W.2d 46, the Court said under either the public policy exception to the at-will doctrine or the statutory provisions in N.D.C.C. 34-01-20, a prima facie case for retaliatory discharge required an employee to show: (1) the employee engaged in protected activity; (2) the employer took adverse action against the employee; (3) the existence of a causal connection between the employee's protected activity and the employer's adverse action.