After years of a north-south civil war in Sudan, South Sudan formed as a separate nation in 2011 after a majority of the people living there — A fled to refugee camps in Sudan B overthrew the ruling monarchy C voted in a referendum for independence D signed a new constitution for the country
C since in 2011, the South Sudanese voted on a referendum in which about 99% of the voters voted to separate from Sudan and to become an independent country.
