What Happens Once the Union Begins the Campaign to Collect

What happens once the union begins the campaign to collect authorization cards?

A) If the union gets 75 percent or more of the qualified employees to sign the cards, the employer must accept the union as a bargaining agent.
B) If the union gets at least 50 percent or more of the qualified employees to sign the cards, the NLRB must conduct an election.
C) The union needs 30 percent or more of the qualified employees to sign the cards in order to petition the NLRB for an election.
D) The employer usually resists the union's card-signing campaign.
E) The employer typically supports the union's card-signing campaign in order to reduce disruption in the workplace during the campaign.