Jeremy plots the points (4, 3) and (4, -6) on the coordinate plane. Which of the following statements best describes the points he plotted?

A. the points form a vertical line segment that measures 9 units

B. the points form a horizontal line segment that measures 7 units

C. the points form a vertical line segment that measures 7 units

D. the points form a horizontal line segment that measures 9 unit