Provide an Appropriate Response $y = \frac { 8 x } { x ^ { 2 } + 1 }$

Multiple Choice

Provide an appropriate response.
-Find an equation for the tangent to the curve $y = \frac { 8 x } { x ^ { 2 } + 1 }$ at the point $( 1,4 )$ .

A) $y = x + 4$
B) $y = 0$
C) $y = 4$
D) $y = 4 x$