What is the standard deviation of carlas stock given the following information:

a. 0.0741

b. 0.0741%

c. none of the listed is correct

d. 0.0907

e. 0.0907%

\begin{tabular}{|l|l|} \hline Year & Return \\ \hline 2012 & 0.05 \\ \hline 2013 & -0.09 \\ \hline 2014 & 0.08 \\ \hline \end{tabular}