Questions: In Northeast cities during the market revolution, (A) population declined. (B) wealth inequality declined. (C) political corruption declined. (D) the wealth gap between the rich and poor significantly widened. (E) neighborhoods became more ethnically mixed.

The answer is (D) the wealth gap between the rich and poor significantly widened.

This option is incorrect. During the market revolution, Northeast cities experienced significant population growth due to increased immigration and urbanization. The industrialization of the region attracted many people seeking employment opportunities.

This option is incorrect. The market revolution led to increased industrialization and economic growth, but it also resulted in greater wealth inequality. The rise of factories and businesses created a wealthy class of industrialists and entrepreneurs, while many workers faced low wages and poor working conditions.

This option is incorrect. Political corruption was a significant issue during this period, with political machines and patronage systems becoming more entrenched in urban areas. The rise of powerful political figures who controlled city politics often led to increased corruption.

This option is correct. The market revolution led to significant economic changes, including the growth of industry and commerce. However, these changes also resulted in a widening wealth gap, as the benefits of economic growth were not evenly distributed. The rich became wealthier, while many workers and immigrants struggled to make ends meet.

This option is partially correct but not the best answer to the question. While it is true that Northeast cities became more ethnically diverse due to immigration, the question specifically asks about the wealth gap, which is more directly addressed by option (D).