How did the increase in rail lines contribute to growing sectionalism in America?
A. They reduced the need for Northern industry
B. They employed mostly freed blacks
C. They isolated the South
D. They helped to expand slavery westward

An increase in rail lines contribute to growing sectionalism in America, helped in expansion of slavery westward. Hence, option D is correct.

What is slavery?

Slavery is the act of enslaving humans for the purpose of carrying out labor activities. It was active in the United States of America and had a huge presence until the 19th century.

When the railroad industry got developed during the 19th century, transportation became easy, which in turn gave rise to the practice of slavery in the American society.

Hence, option D is true regarding slavery.

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How did the increase in rail lines contribute to growing sectionalism in America? A. They reduced the need for Northern industry B. They employed mostly freed blacks C. They isolated the South D. They helped to expand slavery westward

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What is slavery?

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How did the increase in rail lines contribute to growing sectionalism in America?
A. They reduced the need for Northern industry
B. They employed mostly freed blacks
C. They isolated the South
D. They helped to expand slavery westward