If the Reaction Is Taking Place in an Acidic Solution

If the reaction is taking place in an acidic solution, the balanced equation is:

A) 2Fe + 14H⁺ + 2Cr₂O₇²⁻ → 2Fe³⁺ + 2Cr³⁺ + 2H₂O.
B) Fe + H⁺ + Cr₂O₇²⁻ → Fe³⁺ + Cr³⁺ + H₂O.
C) 2Fe + 14H⁺ + Cr₂O₇²⁻ → 4Fe³⁺ + 2Cr³⁺ + 28H₂O.
D) 2Fe + 14H⁺ + Cr₂O₇²⁻ → 2Fe³⁺ + 2Cr³⁺ + 7H₂O.
E) 4Fe + 10H⁺ + Cr₂O₇²⁻ → 3Fe³⁺ + Cr³⁺ + 7H₂O.