The Mongols invaded Korea, known as Goryeo at the time, on several occasions between the years of 1231 and 1270. Which statement is true of those invasions?
OA. The Mongol forces were destroyed by a typhoon off the Korean coast.
OB. Korea was ruled by the Mongol Yuan Dynasty for many years.
OC. Korea defeated the Mongols with the help of the Chinese military.
OD. The Mongols lost nearly all of their soldiers to a superior Korean army.

The persians landed in the plains near athens. as their army greatly outnumbered that of the greeks, the greeks hoped to find aid from nearby sparta. a long-distance runner named pheidippides was sent from athens to sparta to request , but the spartans were not able to send more soldiers at the time. regardless, the greeks were still able to win the battle. centuries later, legend developed that a runner had been sent from the battle to athens after the greek victory. after reaching athens, the runner proclaimed, "we are victorious! " and then fell to the ground and died. this legendary story is the inspiration for the modern long-distance runs that are performed today. this passage refers to the events of which battle during the persian wars? a. battle of thermopylae b. battle of salamis c. battle of plataea d. battle of marathon