The correct answer is A. rate of return.
The rate of return is a measure of the performance of an investment. It is calculated by dividing the dollar return by the invested amount. The rate of return can be expressed as a percentage or a decimal.
For example, if you invest $100 and receive a dollar return of $10, your rate of return is 10%. This can be expressed as 10/100 = 0.10.
The rate of return is an important metric for investors because it allows them to compare the performance of different investments. It is also used to calculate the internal rate of return (IRR), which is a measure of the profitability of an investment.
The other options are incorrect because they do not accurately describe the concept of rate of return.
Option B, return amount, is simply the dollar amount that is returned on an investment. It does not take into account the invested amount, so it cannot be used to calculate the rate of return.
Option C, investment rate, is a term that is sometimes used to describe the rate of return. However, it is not a standard term, and it can be used to describe other concepts as well.
Option D, received amount, is the dollar amount that is received from an investment. It is equal to the dollar return plus the invested amount.