Which cause and effect chain show the relationship between big business and transportation in in the united states in the latter half of the 19th century? a. the expansion of railroads brought more immigrants to the united states - caused - big business benefited from greater competition workers. b. the expansion of railroads sped up movement of people and goods- caused - big business profited from access to more resources and markets c. the expansion of railroads reduced conflict among settlers and american indians-caused- big business introduced manufactured goods to more communities d. the expansion of railroads encouraged labor to organize unions-caused- big business grew as result of increased productivity from scientific management.