The main purpose of the first labor unions were getting better conditions and better pay for workers. The correct option among all the options that are given in the question is the second option or option "B". The labors needed the union to get rid of deprivation that the business owners were doing. I hope the answer helps you.
<span>In an effort to preserve the balance of power in Congress between slave and free states, the Missouri Compromise was passed in 1820 admitting Missourias a slave state and Maine as a free state.</span>
Small bands of Patriots attacked British forces using the hit-and-run technique of "guerrilla warfare". This was absolutely necessary for victory because they were so outnumbered.