The Sixth Derivative $\frac { d ^ { 6 } } { d x ^ { 6 } } \left( x ^ { 6 } - 3 x ^ { 3 } + 5 \right)$

Multiple Choice

The sixth derivative $\frac { d ^ { 6 } } { d x ^ { 6 } } \left( x ^ { 6 } - 3 x ^ { 3 } + 5 \right)$ is

A) 720
B) $72 x$
C) 0
D) -720
E) -720 $x$