What Event Was a Major Driver for the People of Manchester

Multiple Choice

What event was a major driver for the people of Manchester, England to demand better working conditions in the factories?

A) Smelter workers and metallurgists diseases associated with the handling of and exposure to mercury
B) A spike in WCB claims
C) An outbreak of fever among the children working in their cotton mills
D) The fatal injuries to a prominent labour leader
E) Shortage of able-bodied workers