Answer:
d. Africa's challenges include its geography and colonial legacies
Step-by-step explanation:
Jeffery Sachs is an economist and a worldwide expert on fight against poverty, economic, and sustainable development.
He believes Africa's challenges include its geography and colonial legacies
Colonial legacies have resulted in continued exploitation of the African continent through continued influence present government and as a result key policies.
Geographs of the continent also poses problems. The tropical weather results in low nutrient retention by the soil, therefore more effort is used to produce substantial agricultural output