The spreadsheet linked below contains weekly stock prices for Macy's (M). Based on those prices, what is the (annual) volatility of Macy's stock?

A. 7%

B. 23%

C. 36%

D. 41%

E. 47%

Macy's (M) Weekly closing prices \begin{tabular}{|r|l|} \hline Week & Price \\ \hline 1 & 19.40 \\ \hline 2 & 18.48 \\ \hline 3 & 17.10 \\ \hline 4 & 18.21 \\ \hline 5 & 16.71 \\ \hline 6 & 15.72 \\ \hline 7 & 15.67 \\ \hline 8 & 17.44 \\ \hline 9 & 17.46 \\ \hline 10 & 19.46 \\ \hline 11 & 21.01 \\ \hline 12 & 19.59 \\ \hline 13 & 21.01 \\ \hline 14 & 22.23 \\ \hline 15 & 23.65 \\ \hline 16 & 23.46 \\ \hline 17 & 22.07 \\ \hline 18 & 20.40 \\ \hline 19 & 20.30 \\ \hline 20 & 20.65 \\ \hline 21 & 22.13 \\ \hline 22 & 23.01 \\ \hline 23 & 22.76 \\ \hline 24 & 23.08 \\ \hline 25 & 24.46 \\ \hline 26 & 22.10 \\ \hline 27 & 22.27 \\ \hline 28 & 20.57 \\ \hline 29 & 22.66 \\ \hline 30 & 19.59 \\ \hline 31 & 18.88 \\ \hline 32 & 16.94 \\ \hline 33 & 17.49 \\ \hline 34 & 18.48 \\ \hline 35 & 17.74 \\ \hline 36 & 17.07 \\ \hline 37 & 16.34 \\ \hline 38 & 15.37 \\ \hline 39 & 14.99 \\ \hline 40 & 14.79 \\ \hline & \\ \hline \end{tabular}