What is the beta of a $4-$stock portfolio including $25\%$ of stock A with a beta of $0\mathrm{.}90,40\%$ of stock B with a beta of $1\mathrm{.}05,25\%$ of stock C with a beta of $1\mathrm{.}73,$ and $10\%$ of stock D with a beta of $1?$

A$.$

$1\mathrm{.}35$

B$.$

$1\mathrm{.}02$

C$.$

$1\mathrm{.}18$

D$.$

$1\mathrm{.}25$