Answer:
c. rate of return
Step-by-step explanation:
An interest rate can be described as the percentage that is paid by a loan borrower or charged by the lender on a loan. An interest rate is also the percentage of the amount borrowed, lent or deposited that is due per period.
An interest rate can also be referred to as a rate of return (RoR) to describe the amount of regular return that is expected to be paid to investors on a debt instrument like a certificate of deposit or bond.
Based on the above explanation, a straight forward example of a rate of return, often used for simplicity, is the interest rate.
Therefore, the correct option is c. rate of return.