Timed! Please answer quickly! (Provide explanations if possible.)
Which function and domain could represent the given graph?

A: f(x) = 1 – [x]; –3 < x < 3
B: f(x) = 1 + [x]; –3 ≤ x ≤ 3
C: f(x) = –[x]; –3 ≤ x ≤ 3
D: f(x) = [x]; –3 < x < 3