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.
- $$r = 3 \cos 3 \theta$$

A) $x$ -axis, $y$ -axis, origin
B) $x$ -axis only
C) $\mathrm { y }$ -axis only
D) Origin only