The Following Table Shows Tax Payments Made for Various Incomes

Multiple Choice

The following table shows tax payments made for various incomes.According to the information in the table below,the tax system is:
Table 3.1
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$$\begin{array} { | l | r | r | r | r | } \hline \text { Taxable income } & \$ 1,000 & \$ 2,000 & \$ 4,000 & \$ 8,000 \\\hline \text { Tax payments } & \$ 10 & \$ 30 & \$ 90 & \$ 270 \\\hline\end{array}$$

A) progressive throughout all levels of income.
B) progressive between $1,000 and $2,000 of income but regressive above $2,000.
C) regressive throughout all levels of income.
D) regressive between $1,000 and $2,000 of income but progressive above $2,000.
E) proportional throughout all levels of income.