The graph of f(x) = x is reflected across the y-axis to create the graph of function g. How do the domains of f and g
compare?

A. The domains off and g are both x > 0.
B. The domains off and g are both all real numbers.
C. The domain offis x 20, while the domain of g is xs 0.
D. The domain offis xs 0, while the domain of g is x 20.