The correct answer is D. all of the above.
Nominal interest rate is the rate of interest that is stated on a loan or investment. It is the rate that is used to calculate the interest that is paid or earned on the loan or investment.
Periodic rate is the rate of interest that is charged or paid on a loan or investment over a period of time. It is usually expressed as a percentage per year.
Effective annual rate (EAR) is the actual rate of interest that is paid or earned on a loan or investment over a year. It takes into account the effects of compounding, which is when interest is earned on interest.
Here is a table that summarizes the differences between nominal interest rate, periodic rate, and effective annual rate:
| Nominal interest rate | Periodic rate | Effective annual rate |
| — | — | — |
| The rate of interest that is stated on a loan or investment. | The rate of interest that is charged or paid on a loan or investment over a period of time. | The actual rate of interest that is paid or earned on a loan or investment over a year. It takes into account the effects of compounding. |
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