Step 1: Concept
In a galvanic cell, oxidation occurs at the anode, releasing electrons.
Step 2: Meaning
These released electrons must move to the cathode, where reduction takes place.
Step 3: Analysis
Electrons are physical particles that travel through metallic conductors (the external circuit) rather than the ionic solution.
Step 4: Conclusion
The electron flow is directed from the anode to the cathode via the external circuit.
Final Answer: (C)