Find the Indicated Derivative $f_{z} f(x, y, z)=6 x^{8} y^{3}+8 x^{5} z^{7}+6 y^{4}$

Multiple Choice

Find the indicated derivative.
-Find $f_{z} f(x, y, z) =6 x^{8} y^{3}+8 x^{5} z^{7}+6 y^{4}$

A) $8 x^{5}$
B) $280 x^{4} z^{6}$
C) $56 x^{5} z^{6}$
D) $7 z^{6}$