Which set of ordered pairs represents a function?A.{(3, 1), (3, 2), (3, 3), (3, 4), (3, 5)}B.{(0, 5), (2, 5), (4, 5), (6, 5), (8, 5)}C.{(1, 4), (2, 4), (3, 4), (4, 3), (4, 2)}D.{(2, 3), (3, 4), (4, 3), (3, 2), (2, 1)}