Say the average return on a stock is 12.0% and the standard deviation is 2.5%. Statistics tells us ?

A. all the annual returns of this stock will be 12.0% +/ 2.5 percentage points.

B. the stock is considered very risky.

C. that we can sort of think that about 68% of any particular annual return of this stock will fall between 9.5% and 14.5%.