The Persians,written by Aeschylus,was a Tragedy Based on What Event

The Persians,written by Aeschylus,was a tragedy based on what event in Greek-Persian history?

A) Xerxes's failed invasion of Greece.
B) The Greek runner who raced back to Athens to proclaim the Persian defeat at Marathon.
C) The sack of Athens.
D) The defeat of the Persians at Thermopylae.
E) The capture of the Persian king Xerxes.