Which substance is the reducing agent in the balanced equation below?

14H⁺ + Cr₂O₆²⁻ + 6I⁻ ⟶2Cr³⁺ + 3I₂ + 6H₂O
Group of answer choices

A. Cr₂O₆²⁻
B. H⁺
C. I₂
D. I⁻

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