Calculate the Standard Deviation of X for the Probability Distribution

Multiple Choice

Calculate the standard deviation of X for the probability distribution. Please round your answer to two decimal places, if necessary. $$\begin{array} { | c | c | c | c | c | c | c | } \hline x & - 5 & - 2 & 0 & 3 & 6 & 10 \\\hline P ( X = x ) & 0.2 & 0.3 & 0.2 & 0.1 & 0 & 0.2 \\\hline\end{array}$$

A) $\sigma = 10$
B) $\sigma = 13.31$
C) $\sigma = 0.7$
D) $\sigma = 26.61$
E) $\sigma = 5$