The first invasion of Greece by Persia took place in 492 BC under the leadership of Darius l and ended 490 BC in the Battle of Marathon, where the Greeks took the victory. Due to the defeat in the first invasion, the Persians wanted revenge and at least conquered Greece, so that the second invasion was led by Xerxes, which ended about 40 years after the first invasion, about 449 BC.
The answer is: C.
