The blockade was considered a act of war
Nomads is the right answer.
Anyone who moves from one place to another rather residing in one place is called the nomads. There can be many reasons for the migration of the nomads such as herders change places because of the weather( that is not suitable for their animals). whereas, other nomads including that of the traders and merchants, travels move for exchanging of their goods.
Option B is the right answer.
Darius is known as the King of the Persian empire. He became furious with the city-states of Greece because Athens (Greek city-state) tied up with other states to revolt against Persian rule. His anger led him to launch an armed force to defeat the Athenians. He thought his action of sending the army on the land of Athens would destroy the rebellious part of the empire. But the situation changed and the army of Darius was soon defeated in the hand of the Greek city-state in 490 B.C.
