Consider the following data for a particular sample period: Average return on portfolio P is $30\%,$ and the standard deviation is $40\%.$ The average return on the market during that time is $20\%,$ the standard deviation is $25\%.$ The T$-$Bill rate during that period was $5\%.$ The M$2$ Measure for portfolio P is$\_\_\_\_\_.$

A$.$

$0\mathrm{.}525\%$

B$.$

$0\mathrm{.}625\%$

C$.$

$0\mathrm{.}705\%$

D$.$

$0\mathrm{.}475\%$