Concept:Sentence sequencing based on logical flow of a passage.
Explanation:Sentence Q introduces the empire by stating when it was founded.
So sentence Q must come right after S1, which names the city and empire.
Next, sentence P describes the empire’s geographical extent in its peak period.
This naturally continues from the founding information in Q.
Then sentence R explains what happened to the city in 1565 — it was destroyed and abandoned.
Finally, sentence S concludes the passage by noting that the city lived on in people’s memories despite its ruin.
This order — Q, then P, then R, then S — gives a smooth historical timeline.
The other sequences disrupt this logical flow.
Answer:C. QPRS