Because of the united Greek achievement, a significant amount of the Persian armada was destroyed, and every Persian army was ousted from Europe, denoting a finish of Persia's development westbound into the mainland. The urban areas of Ionia were likewise freed from Persian control.
The fierce activities of Spartan pioneer Pausanias at the attack of Byzantium, for example, distanced a significant number of the Greek states from Sparta and prompted a move in the military order of the League from Sparta to Athens.
The answer is B) American forces were encircled by the Chinese army at Chosin and needed air support. I just took the test and got it right, hope this helps!