8. Which relation is a function?

A. {(5, 0), (0, –8), (5, –5)}

B. {(5, 0), (–8, –5), (–8, 5), (–5, –8)}

C. {(5, 0,) (–8, –5)}

D. {(5, 0), (0, 5), (–5, –5)}

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