Find All Points of Discontinuity, and Determine Whether There Is $f ( x ) = \frac { x - 9 } { x ^ { 2 } + 4 }$

Multiple Choice

Find all points of discontinuity, and determine whether there is a hole or a vertical asymptote at each point.
- $f ( x ) = \frac { x - 9 } { x ^ { 2 } + 4 }$

A) 4: vertical asymptote
B) -4: vertical asymptote
C) 3: vertical asymptote; -3: vertical asymptote
D) no points of discontinuity