What is the domain and range of y = ?

(A) x ≥ 0, y ≥ 0

(B) x > 0, y > 0

(C) -∞ < x < ∞, -∞ < y < ∞

(D) -∞ < x < ∞, y ≥ 0

Because is defined everywhere, the domain and range of this function is –∞ < x < ∞, -∞ < y < ∞