Last week, Marvin's manager fired him for continually coming to work late. In the event that Marvin attempts to sue the manager for unjustly firing him, what would help the manager's case?
A. The manager giving his word that Marvin was frequently warned.
B. A history showing the manager promotes the use of groupware.
C. An electronic trail of the formal warnings the manager gave to Marvin.
D. A history showing the manager assumes all male employees are more likely to be late.
E. Testimonies by other group members that the manager practiced management by walking around.