Given a text T, and several options, according to the question posed in the text T to choose the most appropriate option from the options as the answer, please directly output the most appropriate option, do not need to output the explanation.

The Sharpe ratio is a less-than-ideal performance measure for alternative investments because:
Option A:it uses a semi-deviation measure of volatility.
Option B:returns of alternative assets are not normally distributed.
Option C:alternative assets exhibit low correlation with traditional asset classes.

Answer: B