The block diagram below shows a system with three imputs, reference input $R(s),$ noise input $N(s),$ and the disturbance input, $D(s).$ Find the transfer function $x\frac{s}{N}(s).$

$($A$)\frac{CP}{1+CPH}$

$($C$)\frac{-CPH}{1+CPH}.$

$($E$)\frac{C+P}{1+CPH}$

$($B$)\frac{P}{1+CPH}$

$($D$)\frac{PH}{1+CPH}$

$($F$)\frac{C}{1+CPH}$