Determine Which of the Following Is Not True for the Graph

Multiple Choice

Determine which of the following is not true for the graph of $f ( x ) = \frac { 4 x } { x ^ { 2 } + 4 }$

A) ƒ is continuous on $( - \infty , \infty )$
B) ƒ has no vertical asymptote.
C) ƒ has a horizontal asymptote: y = 0.
D) ƒ has no point of inflection.
E) ƒ has a relative maximum and a relative minimum.