Answer:
They transported significant amounts of goods and built national marketing systems.
Explanation:
Railroads increased marketing and grew the industry.
On May 2, 1890, the Oklahoma Organic Act was passed officially creating Oklahoma Territory, which initially excluded lands occupied by the Five Civilized Tribes, but reorganized the legal system of Indian Territory, providing for a mechanism to consolidate Oklahoma and Indian Territories.
They started using perspective and this is what gave the illusion of depth in the images