Which factor produced gains in union membership in the United States during the late 19th century and early 20th century?

the encouragement factory owners gave to organized labor

the increased efforts of the federal government to break up monopolies

the beginning of widespread outsourcing of American jobs to foreign countries

the shift from an agricultural economy to an industrial economy

Question

Which factor produced gains in union membership in the United States during the late 19th century and early 20th century?

 the encouragement factory owners gave to organized labor

 the increased efforts of the federal government to break up monopolies

 the beginning of widespread outsourcing of American jobs to foreign countries

 the shift from an agricultural economy to an industrial economy

anonymous · Answer

medal and fan

anonymous · Answer

http://openstudy.com/study#/updates/51b0fe6fe4b06ee3ee27491b

anonymous · Answer

I don't know if it will help but it ok. 
I guess

paki · Answer

what u think about the answer here...?

anonymous · Answer

I got the answer right is( the shift from an agricultural economy to an industrial economy)