Question

Which group was most concerned with helping improve the dangerous working conditions in early-20th century industry?

Answer 1

C and d have to do with the upper classes and how they (mostly) utilized labor. Populists were more concerned with how to make things work for them (a bit cynical on my part). 

The progressives (particularly women and labor leaders) were very concerned about working conditions and how to improve them.

B<<<< answer

Answer 2

Answer:  B) Progressives

Explanation: The Progressive Movement was concerned with many things, and improving industrial working conditions was one of them. Politicians from the two major parties were often involved in the movement, which helped create safety standards and laws to end child labor in factories. Also, remember that the Populists were concerned more with agricultural issues and were not as active in the 20th century as they were in the 19th.