Suppose two portfolios have the same average return, the same standard deviation of returns, but portfolio $x$ has a higher beta than

:portfolio Y$.$ According to the Sharpe measure, the performance of portfolio X

$.$is better than the performance of portfolio Y$.$A

$.$is the same as the performance of portfolio Y $.$B

$.$cannot be measured as there is no data on the alpha of the portfolio. $C$

$.$is poorer than the performance of portfolio Y$.$D