$A.\ \ \ \ x\left(x+1\right)+x$

$B.\ \ \ \ x+2.x+3$

$C.\ \ \ \ x\left(x-y\right)\left(x+4\right)$

$D.\ \ \ \ x\left(x+y\right)+2\left(x+y\right)$

$$\left(y-1\right)\left(x+3\right)$$

$$\left(y-1\right)\left(x-3\right)$$

$$\left(1-y\right)\left(x+3\right)$$

$$\left(1-y\right)\left(x-3\right)$$