A galvanic cell is constructed using copper and silver half-cells under standard conditions, as represented in the diagram.

\[ \text{Cu}(s) + 2\,\text{Ag}^+(aq) \rightarrow \text{Cu}^{2+}(aq) + 2\,\text{Ag}(s) \]

After the circuit is closed, the cell operates until a total of \(4\) electrons have passed through the external wire. Which of the following particulate diagrams best represents the solution contents of the two half-cells at this point? (Water molecules and spectator ions are omitted for clarity.)