This exercise is concerned with operations with inequality and interval notations.
Match the sets and the inequalities by placing the letter of the inequality next to each set listed below:

 1. All $x$ in the interval $(-18,6]$
 2. All $x$ in the interval $[-18,6)$
 3. $x$ is greater than $-18$
 4. $x$ is nonnegative

A. $-18<x\leq 6$
B. $-18<x$
C. $-18\leq x<6$
D. $x\geq0$