The Range Of $f(x)=\llbracket x \rrbracket$ , the Greatest Integer Function, Is
A)

Multiple Choice

The range of $f(x) =\llbracket x \rrbracket$ , the greatest integer function, is

A) $\{\ldots,-4,-2,0,2,4, \ldots\}$
B) $(-\infty, \infty)$
C) $[0, \infty)$
D) $\{\ldots,-2,-1,0,1,2, \ldots\}$