Let f(x) = x - 5 and g(x) = 4x2. Perform the function operation and then find the domain of the result. (f - g)(x) (f - 9)(x) = (Simplify your answer.) What is the domain of (f - g)(x)? O A. The domain of f - g is the set of all x SO. O B. The domain of f - g is the set of all x 2 0. O C. The domain of f - g is the set of all real numbers except x = 0. O D. The domain of f - g is the set of all real numbers