Test for Symmetry with Respect To $\theta = \pi / 2$

Test for symmetry with respect to $\theta = \pi / 2$ , the polar axis, and the pole.
$$r = \frac { 6 } { 5 + \sin \theta }$$

A) symmetric with respect to the pole
B) symmetric with respect to the polar axis
C) symmetric with respect to $\theta = \pi / 2$
D) symmetric with respect to the pole and the polar axis
E) symmetric with respect to the pole and $\theta = \pi / 2$