Al what points $($x$,$y$,$z$)$ in space are the functions continuous?

a$.n(x,y,z)=ln(z-5x^2-4y^2-4)$

b$.h(x,y,z)=\frac{1}{x-\sqrt[\phantom{2}]{x^3{y}^3}}$

A$.$ Al points satialying $z-5x^3-4y^{3}48.$ Al points except $(0,0,0)$

C$.$ Ap points notingthg $r-5r^3-5r^{3}t($A$)$ pointu satulying $z-5x^3>4y^3-4$

E$.$ Al points satisfyeng $x-5x^3-4y^2>4$ F$.$ Al points satiofying $xy,z$

Q$.$ Al points M$.$ No points