All of the following are policies that will benefit Sub-Saharan Africa's economic
development in the 21st century except:
a. The use of oil revenues
b. Technological improvements
C. Management of international debt
d. Sending money for foreign investments

a mid-ocean ridge or mid-oceanic ridge is an underwater mountain range, formed by plate tectonics. this uplifting of the ocean floor occurs when convection currents rise in the mantle beneath the oceanic crust and create magma where two tectonic plates meet at a divergent boundary.a geomagnetic reversal is a change in a planet's magnetic field such that the positions of magnetic north and magnetic south are interchanged.