Progressive Era reformers of the late 19th and early 20th century were most concerned with the social problems that arose as a result of a) Tim Crow segregation
b) the Great Awakening
c) industrialization
b) the scientific revolution

Choice C!

Explanation:

Industrialization! For example, many factories at the time employed women in unsafe working conditions, resulting in incidents like the Triangle Shirtwaist Fires. Also, a famous work from the period, The Jungle by Upton Sinclair, was written about the unsanitary and dangerous nature of meatpacking plants.

A. Increased migrations along the islands.

This is the most logical answer of the four