Work became more dangerous in the 1800's. This was a result of the increase in industrialization, it caused machines to be more powerful, and easier to cause harm. Also, workers in the late 1800´s had a very low standard of living, consequence of their low wages. So this caused 4 things:
Low skilled jobs often didn't result in better wages or better and safer working conditions, so they attempted to try to get into a skilled trade.
They often demanded higher wages because jobs often came with very low wages for workers.
Workers began to join forces to gain enough power to impose better wages and working conditions. They joined forces with other employees creating 'working unions'.
Sometimes they just tried to find a better job when none of the other options were available, or didn't work at all.
I hope this helps understand why all of the options are correct. Working in the 1800's was a risky business!
