$z^3$: \begin{matrix} z^3 &=& (x+yi)^3 &=& \underbrace{(x^3 - 3xy^2)}_{\large{1}} + i.\underbrace{(3x^2y - y^3)}_{\large{1}} &=& 1+i \end{matrix}$|z|$:\begin{matrix} |z^3| &=& |z|^3 &=& \sqrt{1^2+1^2} &\Rightarrow& |z| &=& \sqrt[6]{2} \end{matrix}\begin{matrix} Letra \ (B) \end{matrix}