Give the Equation of the Horizontal Asymptote, If Any, of the Function

Multiple Choice

Give the equation of the horizontal asymptote, if any, of the function.
- $$f ( x ) = \frac { x ( x - 1 ) } { x ^ { 3 } + 49 x }$$

A) $x = 0 , x = - 49$
B) $y = 1$
C) no horizontal asymptotes
D) $y = 0$