Provide an Appropriate Response $\mathrm{z}=0$ Is a Plane Identical To, Parallel to (But Not Identical

Multiple Choice

Provide an appropriate response.
-Determine if the graph of the equation $\mathrm{z}=0$ is a plane identical to, parallel to (but not identical to) , or perpendicular to the $x y$ -plane.

A) Perpendicular
B) Identical
C) Parallel
D) None of these