Test the Polar Equation for Symmetry with Respect to the Polar

Multiple Choice

Test the polar equation for symmetry with respect to the polar axis, the pole, and the line $\theta = \pi / 2$ . $r ^ { 2 } = 9 \cos 2 \theta$
I $\text { symmetric about the polar axis }$
II $\text { symmetric about the pole }$
III $\text { symmetric about the line } \theta = \pi / 2$

A) I only
B) I and II
C) I and III
D) II and III
E) I, II, III