Select the Boolean expression for this circuit?

$r(x,y,z)\frac{-}{{?}_y}z+y+z$

$F(x,y,z)=(z+y+z)y^{\text{'}}z$

$F(x,y,z)=xyz+(y^{\text{'}}+z)$

$F(x,y,z)=(x+y+z)+(y^{\text{'}}z)$

$F(x,y,z)=(x+y+z)+(y{z}^{\text{'}})$