(04.01 LC)

Which set of ordered pairs represents a function? (1 point)

Select one:
a. {(0, 1), (1, 3), (1, 5), (2, 6)}
b. {(0, 0), (1, 2), (2, 4), (3, 4)}
c. {(0, 1), (1, 2), (2, 3), (2, 4)}
d. {(0, 0), (0, 2), (2, 2), (2, 4)}