Answer:
The correct answer is A. At the Battle of Marathon, the Athenians defeated the Persians.
Step-by-step explanation:
The Battle of Marathon took place during the First Persia War in 490 BC. It opposed a Persian landing with the Athenian and Plataean hoplites, who finally obtained victory.
Following the Ionian revolt, Darius decided to punish the Greek cities that had helped his rebellious subjects. After taking Naxos and Eretria, the Persian expedition landed on Marathon. After five days in a row, the Athenian and Plataean forces crushed the Persian infantry, causing heavy losses to it. The Greek army then quickly retreated to Athens to prevent the landing of the other part of the Persian expeditionary body at Phalere.
This victory ended the First Persian War. A new attack took place ten years later under the leadership of Xerxes. The Battle of Marathon played an important political role with the affirmation of the Athenian democratic model.