Four factors that reduce a population is the food decrease, death, diseases, and mass murder
I would say b, but that is a guess
The correct answer is D. Sudanese refugees fled to neighboring countries.
Sudanese refugees which fled to neighboring countries led to effects of civil war in Sudan.
The civil war in sudan originated in Southern Sudan where it spread to Blue Nile and Nuba Mountains.
This war was the one which was the longest in record. Six years after the war ended, its result was the independence of South Sudan. It is in this war that many people died, there was outbreak of diseases and famine, and many people were displaced.
Sudan was divided to southern and Northern provinces when it was governed by british.
The answer is vernacular culture region. Vernacular, well known or perceptual social locales are those apparent to exist by their tenants, as is clear by the broad acknowledgment and utilization of an unmistakable territorial name. It becomes out of individuals' feeling of having a place and distinguishing proof with a specific district.
The South's economy was completely devastated by the Civil War, since their economy had been almost entirely agricultural--meaning that they needed to implement entirely new economic programs after the North's victory.