Which of the following statements is false?
 A. In the ordered pair (3, 7), 3 is the x-coordinate.
 B. The point (0, 5) is on the y-axis. 
 C. The horizontal distance between the point located at (3, 7) and the point located at (6, 7) is 3 units.
 D. In the ordered pair (9, 7), 7 is the x-coordinate.