The Figure Below Show a Simplified Version of the Current

Multiple Choice

The figure below show a simplified version of the current (2015) Canadian federal income-tax system.The marginal income-tax rates for the four ranges of income are 15%,22%,26%,and 29%,respectively. FIGURE 18-2
-Refer to Figure 18-2.What needs to be true about the four marginal income-tax rates in order for this tax system to be considered regressive?

A) they need to be smaller than they are now
B) they need to be larger than they are now
C) they need to be constant
D) they need to decrease as income increases
E) they need to increase as income increases