The first progressives felt called to action by:
a. crowded tenements.
b. unsafe food processing.
c. dangerous working conditions.
d. all of the above

All of the above the first Progressives felt called to action.

D. All of the above

Explanation:

Progressivism is the support for or advocacy of social reform. In case of United States it is a broadly based reform movement which reached its peak early in the 20th century.

It arose as a response to the vast changes brought by modernization, such as the growth of large corporations, pollution and fears of corruption in American politics.

The first progressives felt was due to crowded tenements, unsafe food processing and dangerous working conditions which never ensured safety of workers.