most state and local income taxes are either \nprogressive or flat\nregressive or flat\nprogressive or…

Answer:

progressive or flat

Brief Explanations:

Most state and local income tax systems are structured as either progressive (tax rate increases with income) or flat (fixed tax rate regardless of income). Regressive taxes (tax burden falls more heavily on lower incomes) are less common for income taxes, making "progressive or flat" the correct description.