What factors, or combination of factors, led to the rise of labor unions and how effective were they in improving conditions for workers?

Managerial excesses -- in effect, inhumane work conditions prevalent in most factories -- spurred the proliferation of labor unions with their demands for improved conditions, including higher wages, fewer work hours, medical assistance for those injured on-the-job, and paid vacation days.

Explanation:

the answer is c     : )

explanation:

i don't have an explanation because i don't know, but i think the answer is c because i googled it and google is right : ) just kidding google isn't allways right but the answer is still c. i hope this !

answer: the correct answer is d. a christian revivalist movement in the u.s. during the early 19th century

explanation: the second great awakening was lead by the preachers of baptist and methodist congregations in order to gain support for the protestant religion from the 1790's to 1840's