Which of the following is NOT a legal method that employers can use to convince their employees not to sign authorization cards?

Group of answer choices

hang up signs describing ways that unionization might hinder corporate growth and salary increases

set up a website in which they ask employees to support their employer

hold meetings in which they offer to provide benefits in addition to what the union is promising

write letters to employee leaders and ask them not to support the union

tell employees they will be fired if they sign the cards