A Stock Produced Returns of 19 Percent,27 Percent,and -38 Percent

Multiple Choice

A stock produced returns of 19 percent,27 percent,and -38 percent over three of the past four years,respectively.The arithmetic average for the past four years is 7 percent.What is the standard deviation of the stock's returns for the four-year period?

A) 11.63 percent
B) 15.94 percent
C) 19.70 percent
D) 26.25 percent
E) 30.21 percent