After Balancing the Following Equation for the Reaction in Acidic $\rarr$

Multiple Choice

After balancing the following equation for the reaction in acidic media,
Fe²⁺(aq) + Cr₂O₇²(aq) + H⁺(aq) $\rarr$ Cr³⁺(aq) + Fe³⁺(aq) + H₂O(l) what is the sum of ALL the coefficients in the equation?(Remember to include values of 1 in your summation.) Hint: Start by balancing each half-reaction.

A) 6
B) 22
C) 30
D) 32
E) 36