Answer:
Option B, Persian Wars, is the correct answer.
Step-by-step explanation:
Persian Wars were a set of disputes between the Achaemenid Empire of Persia and the Greek city-states. The clash between the fragmented political system of ancient Greece and the immense Persian empire started when Cyrus the Great vanquished Ionia in 547 b.c and had crucial moments in the two abandoned campaigns of the Persians upon Greece in 490 and 480-479 b.c, identified respectively as the First and the Second Persian War. The battle between Persians and Greeks, which the Persian Wars were just a side, endured for more than two hundred years and ended with the subjugation and destruction of the Achaemenid Empire.