14. Which of the following set of ordered pair is a function?
A. [(-2,1),(-1,3), (0,5), (1,1), (2,9)
B. (3,4), (0,2), (-1,6), (2,10), (0.1))
C. (3, 4), (5, 6), (7-8). (3, 10). (9, 12)
D. {(1,5), (2,4), (3,6), (2,5), (4,7), (5,1))​