nmont221 nmont221 29-12-2022 Mathematics contestada 21. Which relation is a function? A. (,0), (0, 1), (2, 2)} B. {(-2,2), (-1, 1), (-2,4)} C. {(-1,4), (0, 5), (0,4)} D. {(2, 1), (4,3), (6,5)}