Which of the Following Conditions And/or Actions May Result in Labour

Which of the following conditions and/or actions may result in labour relations boards imposing a union on an employer in some Canadian jurisdictions, even with as few as 5 percent of the authorization cards signed?

A) Threats by other unions to go on strike if the workplace does not get its own union.
B) Unfair labour practices committed by the employer in the organizing process.
C) The need by government for labour relations peace in workplaces.
D) Advice from the International Labour Office.