Which source would be the best choice to support a research paper on the evolution of baseball in the united states?

Probably the MLB website, or any website that gives descriptive stories of how the game has changed, and the causes/effects associated with its change.

I go to espn and there's a certain link to use to get information on the past and evolution of all sports.

Existing to a lot of people

The social difference that caused sectionalism in the antebellum era would be c.)  north was disorganized. the north had slow population growth, where as the south had mass immigration.hope this really mark