In the Chemical Reaction C₂H₆O + PCl₃ $\rarr$ C₂H₅Cl + H₃PO₃, When the Equation Is Balanced, the Sum

In the chemical reaction C₂H₆O + PCl₃ $\rarr$ C₂H₅Cl + H₃PO₃, when the equation is balanced, the sum of the coefficients of the reactants and products should be: Hint: Distribute coefficients across the entire formula they apply to when calculating atoms.

A) 4
B) 5
C) 6
D) 7
E) 8