Over the last four years, the common stock of Plymouth Shippers has had an arithmetic average return of $10\mathrm{.}4$ percent. Three of those four years produced returns of $16\mathrm{.}1$ percent, $16\mathrm{.}5$ percent, and $9\mathrm{.}4$ percent, respectively. What is the geometric average return for this four$-$year period? A$.9\mathrm{.}88$ percent B$.9\mathrm{.}72$ percent C$.10\mathrm{.}18$ percent D$.10\mathrm{.}26$ percent E$.10\mathrm{.}41$ percent