The function f(x) = (x - 5)^2/2 is not one-to-one. Identify a restricted domain that makes the function one-to-one, and find the inverse function.
A. Restricted Domain: x < 5, Inverse Function: f^{-1}(x) = √{2x} + 5
B. Restricted Domain: x > 5, Inverse Function: f^{-1}(x) = √{2x} - 5
C. Restricted Domain: x leq 5, Inverse Function: f^{-1}(x) = √{2x} + 5
D. Restricted Domain: x geq 5, Inverse Function: f^{-1}(x) = √{2x} - 5