The graph of y = (2x - 4)(x - 4) is a parabola in the xy-plane. In which of the following equivalent equations do the x- and y-coordinates of the vertex of the parabola appear as constants or coefficients? A) y = 2x² - 12x + 16 B) y = 2x(x - 6) + 16 C) y = 2(x - 3)2 + (-2) D) y = (x - 2)(2x - 8)