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.

An analyst wanting to assess the downside risk of an alternative investment is least likely to use the investment’s:
Option A:Sortino ratio.
Option B:value at risk (VaR).
Option C:standard deviation of returns.

Answer: C