Concept:Nigeria’s over-dependence on oil makes falling oil prices a signal that the economy needs other sources of revenue.
Explanation:When oil prices fall, Nigeria earns less foreign exchange and faces economic instability.
This creates serious political and economic concerns.
To reduce over-reliance on oil, the country must look beyond crude oil.
This shift towards developing agriculture, manufacturing, and other sectors is called economic diversification.
Therefore, the fall in oil prices points to the need for diversification.
Answer:B. diversification.