Determine If the Graph Is Symmetric About the X-Axis, the Y-Axis

Multiple Choice

Determine if the graph is symmetric about the x-axis, the y-axis, or the origin.
- $$r = \frac { 2 } { 1 + 3 \cos \theta }$$

A) $y$ -axis only
B) x-axis only
C) $x$ -axis, $y$ -axis, origin
D) No symmetry