a because the back story of the story shows Marley is Scrooge's partner and all they wanted was money
Many people would get sick from the pollution that was a product from coal smoke and working, hard, long hours without any form of a break. Plus, since large machinery was relatively new in this time era, they were particularly unsafe and lead to many workplace related accidents and deaths.
Just did the test I this hope it helps someone in the future!
It is designed for every type of writing task