The average annual return over the period 1926-2009 for small stocks is 21.1%, and the standard deviation of returns is 21.1%. Based on these numbers, what is a 95% confidence interval for 2010 returns? OA. 0%, 42.2% OB. - 21.1%, 63.3% OC. 10.6%, 31.7% OD.-21.1%, 42.2% Click to select your