Which of the Following Statements Is Correct with Respect to the Process

Which of the following statements is correct with respect to the process by which a union organizes the work force of an employer?

A) An employer can refuse to recognize a trade union or have any dealings with it.
B) A union can call the employees it has organized out on strike to force the employer to recognize and deal with that trade union.
C) In most provinces, a trade union must receive government certification through an employee voting process before it has the right to represent the employees in dealings with the employer.
D) The employer can refuse to have anything to do with the union even after it has successfully completed the certification process.
E) Once the union has been certified, the employer must consent to what the union demands in the new contract.