After Balancing the Following Reaction Under Basic Conditions , How

After balancing the following reaction under basic conditions , how many mole equivalents of water are required and on which side of the reaction do they appear?
CrO₄^{2 -} (aq) + Cu (s) →Cr(OH) ₃ (s) + Cu(OH) ₂ (s) [Basic conditions]

A) 2 moles of H₂O on the reactant side
B) 2 moles of H₂O on the product side
C) 4 moles of H₂O on the product side
D) 4 moles of H₂O on the reactant side
E) 8 moles of H₂O on the reactant side