Pls give me brain list
Option C, "Large cities begin to grow in the West," is the best completion for the diagram after the completion of the Transcontinental Railroad because the rapid transportation of people and goods allowed for the development of new towns and cities along the railway lines, particularly in the West. Option D is not an appropriate completion as the ban on travel of African Americans to the West is not directly related to the completion of the Transcontinental Railroad and is a matter of racial discrimination.