The correct option is D Soldiers of Darius ran out of food.
Darius attempted to conquer Greece several times. His first attack on Greece was a failure. During the long march from Persia to Greece, his soldiers suffered from diseases and ran out of food. However, he decided to launch another attack, this time through the sea route. The Persian and the Greek army fought a fierce war at Marathon in 490 BCE, and the Greek soldiers defeated the Persians.