Find The $f ^ { ( 6 ) } ( x )$

Multiple Choice

Find the $f ^ { ( 6 ) } ( x )$ of $f ^ { ( 4 ) } ( x ) = \left( x ^ { 2 } + 1 \right) ^ { 2 }$ .

A) $12 x ^ { 2 } + 4$
B) $12 x ^ { 2 } + 2$
C) $6 x ^ { 2 } + 4$
D) $6 x ^ { 2 } + 2$
E) $12 x ^ { 2 } + 1$