Chris and David Both Arrived One Hour Late for Work

Chris and David both arrived one hour late for work today.Chris was fired.David was given a verbal warning.Such disparate treatment for the same offense could be considered fair and equitable for all of these reasons EXCEPT:

A) Chris was a long-term employee.David was a new hire.
B) Chris comes in late three or four days a week.He has been warned repeatedly about consequences for such behavior.David has never been late before.
C) Chris has proven to be an unreliable employee.He is inaccurate and late in written work.He often misses meetings that he says he attends.David is a reliable employee in other aspects of the job.
D) Upper management demands that time rules be followed by all employees.
E) Chris missed the annual board review.David had nothing scheduled until noon.