Suppose f is an analytic function of the complex variable z = x + i y given by
f(z) = (2x + 3y) + i g (x, y)
where g(x, y) is a real-valued function of the real variables x and y. If g(2, 3) = 1, then g(7, 3) = ?
(A) -14
(B)-9
(C) 0
(D) 11
(E) 18