Answer: Option (D)
Step-by-step explanation:
Vertical equity is referred to as or known as the notion that the taxpayers that have the greater ability to pay the taxes should pay the larger amounts.
Whereas on the other hand the horizontal equity refers to the idea under which the taxpayers that have the similar abilities in accordance with paying taxes should pay same.
Regressive tax is known as or described as the tax under which the high-income earner pay the smaller fraction of income as tax than the other low income earners.