Why did labor unions gain support during the industrial revvolution?

During the Industrial Revolution, labor unions played a critical role in empowering workers. Not only were they effective in helping improve factory conditions and pay rates, they offered workers an important entry point into the political sphere, where they came to embody a powerful constituency with demands and views that required representation.

i believe the correct answer is option b. most eastern european nations joined nato.

though i could be wrong, option d. the eastern european nations were granted complete independence, would be another choice.

hope this ! : )

the space race was a battle to make advanced technology to get to the moon and to get a better understanding of space.