In which of the following reactions is chlorine (CI) oxidized?

A. Br₂ + 2CI⁻ = CI₂ + 2Br⁻
B. CI₂ + 2e⁻ = 2Cl⁻
C. 2CIO₃⁻ + 12H⁺ = CI₂ + 6H₂O
D. 2Na + CI₂ = 2NaCI

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