A Collective Agreement Provided That If Any Discipline Was to Be

A collective agreement provided that if any discipline was to be imposed upon employees the union and the employee involved would be notified within 10 days of any misconduct. Without any prior notification, the employer imposed a five day suspension upon an employee for alleged insubordination 15 days after a confrontation with a supervisor. Which of the following is correct if this matter goes to an arbitrator:

A) The arbitrator only has the authority to reduce the number of days in the suspension.
B) The arbitrator can only order the removal of the suspension from the employee's file.
C) The arbitrator can order the removal of the suspension from the employee's file and reimbursement for the lost pay.
D) The arbitrator has the authority to increase the suspension to 10 days.
E) The arbitrator will confirm the suspension imposed by the employer if it is established that the employee was guilty of insubordination.