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Which is the reducing agent in the follo...

Which is the reducing agent in the following reaction
`2CuSO_(4)+4KItoCu_(2)I_(2)+I_(2)+2K_(2)SO_(4)`?

A

`Cu^(2+)`

B

`I^(-)`

C

`SO_(4)^(2-)`

D

This is a disproportionation

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