A$.$The expected rate of return for Stock A is $...\%$

The expected rate of return for stock B is $...\%$

B$.$ The standards deviation for Stock A is $...\%$

The standards deviation for Stock B is $...\%$

C$.$ based on the $($as measured by the standard deviation$)$ and return of each stock, which investment is better?

$$ A$.$ stock a is better because it has a higher expecting rate of return with less risk

$$B$.$ stock B is better because it has a lower expected rate of return with more risk.