Question

early unions struggled to be effective because a vast supply of cheap labor made workers easy to replace of poor leadership the government executed most striking workers most factory laborers actually liked their working conditions

Explanation:

Early labor unions faced major challenges because employers could easily replace striking or protesting workers with the large pool of available cheap labor. This undermined the unions' bargaining power, as workers feared losing their jobs, and employers had little incentive to meet union demands. The other options are inaccurate: poor leadership was not the primary issue, governments did not execute most striking workers, and factory laborers generally did not like harsh working conditions.

Answer:

a vast supply of cheap labor made workers easy to replace