Concept:A valid course of action must reduce the problem without making it worse.
Explanation:The statement says increased imports have reduced the demand for indigenous smartphones.
Course I favours imposing the least import duties on foreign smartphones.
This would make imported smartphones cheaper and more available, which would further reduce the demand for indigenous smartphones.
So course of action I does not follow.
Course II asks retailers to stop selling imported smartphones.
This would reduce the availability of imported phones and encourage buyers to choose indigenous smartphones.
Hence, course of action II is a practical and helpful step.
Answer:Only course of action II follows.
Correct option: C.