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

After balancing the following equation for the reaction in acidic media,
MnO₄^-(aq) + H₂C₂O₄(aq) + H⁺(aq) $\rarr$ Mn²⁺(aq) + CO₂(g) + 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) 29
B) 30
C) 31
D) 32
E) 33