You Have a Portfolio Which Has an Average Return of 10.3

Multiple Choice

You have a portfolio which has an average return of 10.3%. In any given year, you have a 2.5% probability of earning either a zero or a negative annual return. What is the approximate standard deviation of your portfolio?
$\begin{array}{cr}\text { Probability } & \text { "z" value } \\\text { of loss } & \\1.0\% & 2.326 \\2.5 & 1.960 \\5.0 & 1.645\end{array}$

A) 5.26%
B) 6.43%
C) 6.94%
D) 7.60%
E) 8.14%