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.
The technology that we have versus theirs
The Black Death begin in October 1347 in Europe. Opps. I didn't read the question correctly.
The Black Death was a horrific plague. It made people feel ill and gave people nasty black boils. The boils oozed out blood, hence the name, "Black Death". The total death were about 20 million.