In Which of the Following Circumstances Would the Discharge Be

In which of the following circumstances would the discharge be lawful?​

A) Employee was discharged for sleeping and loafing on the job.
B) Employee was discharged for not covering the tattoos on her arms as per company policy.
C) Employee was discharged for wearing a nose ring to work which the employee handbook prohibited.
D) All of the above.
E) None of the above. Employees may only be discharged for good cause.