Select the correct answer. Quadrilateral ABCD is reflected across the x-axis and then reflect across the y-axis to form quadrilateral A′B′C′D′. If the coordinates of vertex A are (-7, 3), what are the coordinates of vertex A′? A. (7, 3) B. (-7, -3) C. (7, -3) D. (-7, 3) E. (3, 7)