Suppose the tax rate structure is such that a household with an annual taxable income of less than $15,000 pays 10 percent income taxes; a household with annual taxable income of $15,001 to $30,000 pays 20 percent; and a household with annual taxable income of $30,001 to $60,000 pays 30 percent in income taxes. What type of tax does this exemplify? Multiple choice question. A progressive tax A proportional tax A flax tax A regressive tax