What is range of function f(x) = x-1 which is defined everywhere on its domain?

What is range of function f(x) = x-1 which is defined every

1.	What is range of function f(x) = x-1 which is defined everywhere on its domain?
A.	(-∞, ∞)
B.	(-∞, ∞) – {0}
C.	[0, ∞)
D.	None of the mentioned
Answer» B. (-∞, ∞) – {0}