NBCT Early Adolescence (EA) Social Studies – History Component 1 Practice Test

The main idea is that infrastructure like the transcontinental railroad reshaped the economy by linking distant regions into one large market. By connecting East and West, goods could be moved quickly and more cheaply across the country. This lowered shipping costs and opened up new opportunities for manufacturers, farmers, and merchants to sell across a national audience, not just locally. Firms could plan production around a wider customer base, leading to more investment, growth, and the development of nationwide supply chains. That combination—broader access to markets and cheaper distribution—best describes the railroad’s impact on business in the late 19th century. The other options don’t fit because the railroad actually expanded markets, lowered costs, and facilitated better information flow rather than reducing access, increasing costs, or shrinking markets.