I think it is the third one hope that helps
Push factors were ; few jobs, overpopulation, war, natural disasters. Pull factors were ; jobs, safety, better quality of life
The lost income from not taking a shift at work is an oppotunity cost of studying for a test: FALSE
Answer:
opposed left-leaning & socialist governments
He wrote radical views that led to the Russian revolution in the work "The Communist Manifesto" w/ help from Engels