companies attempted to intimidate union organizers by\nblacklisting them.\nsuing them.\nboycotting…

companies attempted to intimidate union organizers by\nblacklisting them.\nsuing them.\nboycotting them.\nimprisoning them.
Answer
Brief Explanations:
Companies have historically blacklisted union - organizers as a means of intimidation. Blacklisting can prevent individuals from finding employment, thus exerting pressure on them. Suing, boycotting, and imprisoning are less common and direct forms of intimidation in this context.
Answer:
blacklisting them.