When the Oxidation-Reduction Reaction Shown Here Is Balanced, How Many $\rightarrow$

Multiple Choice

When the oxidation-reduction reaction shown here is balanced, how many electrons are transferred for each atom of copper that reacts?
Ag⁺(aq) + Cu(s) $\rightarrow$ Ag(s) + Cu²⁺(aq)

A) 1
B) 2
C) 3
D) 4
E) 0