Determine which relation is a function.

A.

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

B.

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

C.

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

D.

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

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