During the initial organizing activities by the in$-$house organizing committee, a union is $$certified$$ by the NLRB as the exclusive representation if employees and agrees to hold a representation election if over:

Group of answer choices

$70$ percent of all employees voting in favor of the union

$60$ percent of all employees voting in favor of the union

$30$ percent of all eligible employees sign authorization cards in favor of the union

$50$ percent of all eligible employees voting in favor of the union