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 slab bounded by the planes x = and x = 5 (planes included)

A) $4 \leq x \leq 5$
B) $x = 4$ and $x = 5$
C) $- \infty < y < \infty$ and $- \infty < z < \infty$
D) $x \leq 4$ and $x \geq 5$