Combine the pairs of sentences by using participles present/past: The robbers saw the policemen. They ran away.

Seeing the policemen, the robbers ran away.

See the policemen, the robbers ran away.,

Saw the policemen, the robbers ran away.

None of these

Seeing the policemen, the robbers ran away.

"Seeing" is the present participle correctly used to show simultaneous action — the robbers ran away when they saw the policemen.