The correct answers are:
1. A sudden decline in unemployment;
A sudden decline in unemployment is not a factor that contributes to poverty in Africa, in fact, that will contribute positively and lower the poverty.
2. Chad;
Chad is one of the least developed countries in Africa. The industry is terrible, agriculture primitive, job opportunities are very few.
3. Algeria;
Even though it is not a developed country, Algeria is by far in better economic condition than the other countries mentioned, and its population has the biggest wages of them all.
4. Oil;
Nigeria is heavily dependent on the export of oil. Every time there's lowering of the price of it, its economy suffers badly, and the ordinary people have it the hardest.
5. An over dependence on a single product;
A very big mistake in most of the African countries economic politics is that they are mostly dependent on the export of one product, and if there's some problem with it, they suffer very badly economically.