The concept of marginal taxation is best exemplified by which one of the following?

Multiple Choice

Burke's Grocer increased its sales by $$52,000$ last year and had to pay an additional $$16,000$ in taxes.

Mariano's Retreat paid only $$45,000$ in taxes on total revenue of $$570,000$ last year. $$

Fazzari's paid $$120,000$ in taxes while its primary competitor paid only $$80,000$ in taxes.

Sunset Charters paid $$2\mathrm{.}20$ in taxes for every $$10$ of revenue last year.