Returns for the Alcoff Company over the last 3 years are shown below. What's the standard deviation of the firm's returns? (Hint:This is a sample, not a complete population, so the sample standard deviation formula should be used.)

Year	Return
2010	21.00%
2009	12.50%
2008	38.40%

Select the correct answer.

A. 25.78%

B. 25.87%

C. 25.81%

D. 25.84%

E. 25.90%