Which of the following statements is correct with respect to the operation of the collective agreement?
a. All disputes arising out of the enforcement of the collective agreement must be handled by conciliation/mediation 
b. All disputes arising out of the enforcement of the collective agreement must be handled by arbitration if they cannot be otherwise resolved.
c. Mediation is a process whereby the mediator/conciliator will hear both sides of the dispute and make a decision binding on the parties
d. Arbitration is a process whereby the arbitrator will hear both sides of the dispute and try and persuade the parties to come to an agreement
e. It is unlawful to include in a collective agreement a provision whereby a new employee must become a member of the union