The correct answer is D) urban expansion and the Northeast boom.
During the time period between 1790 and 1890, the United States experienced significant changes, including the growth of cities and the expansion of industry in the Northeast. This led to an increase in urbanization and a boom in the Northeastern region of the country. Additionally, the United States saw the elimination of slavery and the growth of the Southeast during this time period. However, these changes were not as significant as the urban expansion and the Northeast boom that occurred during this time period. Therefore, the correct answer is D) urban expansion and the Northeast boom.