Find the Derivative of the Function $f ( x ) = ( 4 x + 9 ) ^ { 9 }$

Multiple Choice

Find the derivative of the function. $f ( x ) = ( 4 x + 9 ) ^ { 9 }$

A) $36 ( 4 x + 9 ) ^ { 8 }$
B) $9 ( 4 x + 9 ) ^ { 8 }$
C) $9 x ( 4 x + 9 ) ^ { 8 }$
D) $36 x ( 4 x + 9 ) ^ { 8 }$