What is the arithmetic average return for a stock with the following annual returns: $4\%,8\%,-3\%,5\%,-2\%.$

A$)2\mathrm{.}24\%$

B$)2\mathrm{.}50\%$

C$)2\mathrm{.}31\%$

D$)2\mathrm{.}40\%$

E$)$ None of the above