Concept:Nigerian federalism is structured around the sharing of powers between the central government and the federating states.
Explanation:A key feature of Nigerian federalism is the strong central government.
The Constitution gives the federal government powers over defence, foreign affairs, currency, and other major areas.
This makes the central government more powerful than state governments.
A single-party system is not a feature because Nigeria practises a multi-party democracy.
A centralized fiscal system is not the defining feature, as revenues are shared among federal, state, and local governments.
Local government councils are recognized by the Constitution, but they do not have full autonomy; they operate under state laws.
Therefore, the most accurate feature from the options is the existence of a strong central government.
Answer:D. Strong central government