The statement that most accurately describes inequality in the U.S. is: "The median rural income is less than the median urban income."
While the U.S. does have levels of income inequality, it does not have greater equality than most European countries, and the assertion about a median income gap only existing between genders and not ethnicities is incorrect. Additionally, while the U.S. does have significant income inequality, calling it the "most unequal country in the world" would be an oversimplification, as there are other countries with high levels of inequality as well.