Over the last four years, a stock has had an arithmetic average return of 8.8 percent. Three of those four years produced returns of 16.3 percent, 10.2 percent, and -14.1 percent. What is the geometric average return for this 4-year period?

Select one: a. 9.40 percent b. 8.39 percent c. 8.67 percent d. 9.97 percent e. 7.83 percent