Answer:
d.Proportional tax
Explanation:
A Proportional tax is a tax where the same tax is paid regardless of the income earned. It is also known as a flat tax.
A progressive tax is when the tax paid by high income earners is higher when compared with low income earners.
A regressive tax is when low income earners pay more tax when compared with people who earn a higher income.
I hope my answer helps you.
