Over the Last Four Years, the Common Stock of Plymouth

Over the last four years, the common stock of Plymouth Shippers has had an arithmetic average return of 10.4 percent.Three of those four years produced returns of 16.1 percent, 15.6 percent, and 9.4 percent, respectively.What is the geometric average return for this four-year period?

A) 9.72 percent
B) 10.41 percent
C) 8.93 percent
D) 10.22 percent
E) 9.38 percent