Option C is the right answer that the Ostracism is the one way Athenians tried to safeguard their democracy before the Peloponnesian War.
Ostracism was a political method under the Athenian government, through which a citizen who endangered the security of the states could be exiled for a term of ten years by public vote.
The practice of ostracism was used when some cases clearly represented widespread anger among the citizens. One of the significant example of the democracy of Athens is that the authority of the ostracism was held in the hand of the ordinary people
Yathrib's residents had asked Muhammad to move to the city in order to bring strong leadership and peace. They sought Muhammad's counsel in brokering a peace between the warring tribed of Aws and Khazraj. Hope This Helps! :)
