Answer
B. symmetry with respect to the y-axis
Work Step by Step
Whenever $(r, \theta)$ is on the graph, so is $(-r, -\theta)$.
$(-r, -\theta) = (r, 180^{\circ}-\theta)$
Therefore, whenever $(r, \theta)$ is on the graph, so is $(r, 180^{\circ}-\theta)$.
Then the graph will have symmetry with respect to the y-axis.
