Answer:
The Correct Answer is C) "Fewer working days".
The labor Union tried to achieve fewer working days throughout the industrial revolution but they are not able to achieve.
Workers have to work daily six to seven days a week in 16 hours shift.
Working conditions were very bad, Many kids were working in factories.
Children and women were paid less.
Workers got Lung diseases from poor Air.
Sanitary Condition was also terrible, there was no clean toilets and no water facilities available.
Hope this helps!