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

After balancing the following equation for the reaction in basic media,
OH^- + Bi₂O₃(s) + OCl^-(aq) $\rarr$ Cl^-(aq) + BiO₃^-(aq) + H₂O 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) 8
C) 9
D) 10
E) 14