Find All Values Of $X$ Such That $f ( x ) > 0$

Multiple Choice

Find all values of $X$ such that $f ( x ) > 0$ $f ( x ) = x ^ { 3 } + 4 x ^ { 2 } - 16 x - 64$

A) $( - \infty , \infty )$
B) $( - \infty , - 4 ) \cup ( - 4,4 )$
C) $( - \infty , - 4 ] \cup [ - 4 , \infty )$
D) $( - \infty , - 4 ) \cup ( 0,4 )$
E) $( - 4,4 )$