Which of these devices is most effective in advancing King's argument and helping him prove his point? Why? What makes it effective? Explain with 7-10 complete sentences. ^^^HELPPP PLEASE^^^

Hey!me its for an important test! ! which issue during the progressive era would most likely have united mary harris "mother” jones and lewis hine? a) ending child labor b) regulating monopolies c) using photography to expose poor working conditions d) exposing the lack of jobs available for untrained laborers