Model of travel in major urban centers, such as Boston and New York City, were most transformed during the late nineteenth and early twentieth centuries through the use of

While the Sherman Antitrust Act did have implications for interstate trade by attempting to prevent monopolies, the primary focus of its interpretation during the late nineteenth century was on labor issues rather than on the regulation of trade itself. Therefore, this choice does not accurately reflect the primary impact of the Act's court interpretations.

The federal courts' interpretation of the Sherman Antitrust Act often targeted labor unions, viewing strikes and collective bargaining as illegal conspiracies. This legal approach effectively weakened union power, making it difficult for workers to organize and advocate for their rights.

Although the Sherman Antitrust Act was designed to eliminate trusts and monopolies, its application in the late nineteenth century often failed to result in significant trust-busting actions. Most cases pursued were against labor unions rather than large corporations, making this option misleading.

Railroad rebates were a specific issue related to unfair pricing practices, but the Sherman Antitrust Act was not primarily focused on eliminating such practices at this time. The Act's enforcement was more focused on labor relations, making this choice inaccurate in context.