The correct statement regarding Africa's poverty issue is:
All African nations suffer equally from poverty.
However, it's important to note that this statement is not entirely accurate; while all African nations face challenges related to poverty, the degree and nature of poverty can vary significantly between countries and regions. The other statements provided contain inaccuracies regarding economic classifications and comparisons between sub-Saharan and North African countries, as well as the distribution of income across the continent. It's essential to recognize that poverty is a complex and multifaceted issue that does not affect all nations uniformly.