Which Value of X Makes the Rational Expression $\frac { x ^ { 2 } - 5 x } { x ^ { 2 } + 9 }$

Multiple Choice

Which value of x makes the rational expression $\frac { x ^ { 2 } - 5 x } { x ^ { 2 } + 9 }$ undefined?

A) $3$
B) $- 3$
C) $0$
D) $5$
E) none