Write One or More Inequalities That Describe the Set of Points

Multiple Choice

Write one or more inequalities that describe the set of points.
-The half-space consisting of the points on and behind the yz-plane

A) $\mathrm { y } \leq 0 , \mathrm { z } \leq 0$
B) $x \leq 0$
C) $x > 0$
D) $y > 0 , z > 0$