They would cut of the limp that had the frostbite in order to stop it from hurting the victim and to stop it from spreading to the rest of the body. This is also known as decapitation.
The Quadis were early Germanic people that lived during the time of the Roman Empire. They invaded the Danube region from 166-180 A.D.
Based on information, your corrct answer would be Option C. Before battles, the Persian Empire became very strong, and they had a good leadership mainly because of Cyrus. And because they were so strong and they had enough power, they simply just drove them out of their land and expanded there land control over to Asia.