Labour Boards in Most Provinces Have All but Which One

Labour boards in most provinces have all but which one of the following remedies available to them?

A) to subpoena witnesses
B) to order unfairly discharged employees reinstated
C) to enter workplaces to inspect work processes and questions workers and managers
D) to certify a union with less than majority support where an unfair labour practice has prevented employees' true wishes from becoming known
E) to close down unsafe workplaces