Question 22 Not yet answered Points out of 2.00 p Flag question Which of the following is true? Select one: A. A proportional tax rate structure imposes an increasing marginal tax rate as the tax base increases O B. An example of a progressive tax rate structure is sales taxes OC. A regressive tax rate structure imposes a constant marginal rate at all levels of the tax base OD. An example of a regressive tax rate structure is FICA payroll taxes