Which set of ordered pairs does NOT represent a function?

Responses

(0, 1), (2, 2), (4, 8), (-2, 7), (5, 8)
(0, 1), (2, 2), (4, 8), (-2, 7), (5, 8)

(0, 1), (2, 2), (4, 8), (2, 7), (5, 8), (7, 9)
(0, 1), (2, 2), (4, 8), (2, 7), (5, 8), (7, 9)

(-4, 2), (-3, 2), (-2, 2), (-1, 2), (0, 2), (1, 2)
(-4, 2), (-3, 2), (-2, 2), (-1, 2), (0, 2), (1, 2)

(-3, 6), (2, 7), (0, 5), (1, 5), (4, 9), (5, 4)

AAAaannndd the bot gets it wrong yet again!

All the input values are unique, so it's a function.

Try B: 2 is used twice

(-3, 6), (2, 7), (0, 5), (1, 5), (4, 9), (5, 4)