Convert the Integral Below from Rectangular Coordinates to Both Cylindrical $\int_{-3}^{3} \int_{-\sqrt{9-x^{2}}}^{\sqrt {9-x^2}}\int_{x^2+y^2}^{9} x d z d y d x$

Multiple Choice

Convert the integral below from rectangular coordinates to both cylindrical and spherical coordinates, and evaluate the simpler iterated integral.
$\int_{-3}^{3} \int_{-\sqrt{9-x^{2}}}^{\sqrt {9-x^2}}\int_{x^2+y^2}^{9} x d z d y d x$

A) $8 \pi$
B) $\frac { 1 } { 4 }$
C) $\frac { 1 } { 4 } \pi$
D) $2 \pi$
E) 0