Which act was established to prevent illegal transportation of goods between states?

The Interstate Commerce Act is the correct choice because it was specifically enacted to regulate the railroad industry and its monopolistic practices, and it aimed to ensure fair rates for transporting goods across state lines. Passed in 1887, this act was a response to growing public outcry against the unfair practices of railroads, which often charged exorbitant rates and engaged in discriminatory pricing practices. The act established the Interstate Commerce Commission (ICC), which was granted the authority to oversee and regulate railroad rates and practices, thus promoting fair competition and preventing illegal transportation practices between states.

In contrast, the Civil Rights Act focuses on prohibiting discrimination and ensuring equal rights, the Federal Trade Act pertains to protecting consumers and preventing anti-competitive practices, and the National Industrial Recovery Act was aimed at stimulating economic recovery during the Great Depression by regulating industry and labor standards. None of these acts are directly related to the regulation of transportation and trade practices across state boundaries, making the Interstate Commerce Act the most relevant option in this context.