The answer is D. expensive wars with neighboring tribes.
The correct answer is A) proportionally.
<em>According to the chart, the citizens are being taxed proportionally.
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When using proportionally tax, the government charges the same percentage of tax to taxpayers, independently of the individual income. The tax is charged a flat rate. So many people identify this tax with the name of flat rate. The graph clearly shows that citizen A has an income of $35,000 and citizen B has an income of $72,000, and both citizens are charged 11% of tax.
