Why was the twelfth amendment added to the constitution?

What is the main idea of this excerpt? 1.1.3

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

What restrictive measure required voters to pay to vote