The Following Questions Refer to a Galvanic Cell That Utilizes $\to$

The following questions refer to a galvanic cell that utilizes the following reaction (unbalanced) : (AuCl₄) ^-(aq) + Cu(s) $\to$ Au(s) + Cl^-(aq) + Cu²⁺(aq)
Determine the number of electrons transferred during the reaction (when balanced) .

A) 2
B) 3
C) 4
D) 6
E) 9