In Which of the Following Ways Did Nigerian Economic Policy

In which of the following ways did Nigerian economic policy of the 1990s differ from that of the 1970s?

A) Tariff barriers meant to protect native industries were lower and there were fewer parastatal industries.
B) Tariff barriers to protect native industries were higher, but Nigeria was less dependent on oil exports.
C) Nigeria's economy was no longer highly regulated, but it remained even more dependent on oil exports.
D) There was less patrimonialism on the part of the government and much less state regulation of the economy.
E) Patrimonialism was a bigger problem, and the state intensified its policy of import substitution industrialization.