Answer:
B. historic return over long time periods.
Explanation:
Variance is a metric applied in statistics to determine the squared deviation of a random variable from its mean value.
The variance of a return of investment is a measure of the historic return over large time periods. The historical return approach is more commonly used in the exercise of investing. It follows the data which is a finite set of historical returns of investment and assumes that each possible result has an equal probability.
