Determine which relation is a function.



A.



{(–4, 3), (–2, 3), (–1, 2), (2, 5), (3, 2)}



B.



{(–4, 1), (–2, 3), (–2, 1), (–1, 5), (3, 2)}



C.



{(–4, 1), (–2, 3), (–1, 2), (3, 5), (3, 2)}



D.



{(–4, 1), (–2, 3), (–1, 1), (–1, 5), (3, 2)}