How would you modify the balanced redox reaction in acidic solution: Cr₂O₇^2- + Fe²⁺ → Cr³⁺ + Fe³⁺ to balance it in basic solution?

• A. Add OH^- to both sides and adjust water molecules accordingly.
• B. Add O₂ to both sides and adjust water molecules accordingly.
• C. Add electrons to both sides and adjust water molecules accordingly.
• D. Add H⁺ to both sides and adjust water molecules accordingly.

Answer: (A)