Describe the business techniques and innovations the industrialists of the late 1800s used to achieve success.

 Technological advances transformed America in the last quarter of the nineteenth century, the period known as the Gilded Age. Enterprising Americans built on the innovations of the first Industrial Revolution and the national networks of transportation and communication established by railroad track and telegraph line earlier in the century. They created new industries and tapped into a truly national market for manufactures and consumer goods. 

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The answer is option b and c.